QNT 275 Week 5 Practice Connect Knowledge Check
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QNT 275 Week 5 Practice Connect Knowledge Check
A sequence of values of some variable or composite of variables taken at successive, uninterrupted time periods is called a
seasonal factor.
cyclical component.
moving average.
least squares (linear) trend line.
time series.
The chisquare goodnessoffit is _________ a onetailed test with the rejection region in the right tail.
never
sometimes
always
When the moving average method is used to estimate the seasonal factors with quarterly sales data, a ______ period moving average is used.
4
8
5
2
3
An experiment consists of 400 observations and four mutually exclusive groups. If the probability of a randomly selected item being classified into any of the four groups is equal, then the expected number of items that will be classified into group 1 is _____.
100
125
150
25
The range for r2 is between 0 and 1, and the range for r is between ____________.
There is no limit for r.
−1 and 0
0 and 1
−1 and 1
In simple regression analysis, the quantity that gives the amount by which Y (dependent variable) changes for a unit change in X (independent variable) is called the
correlation coefficient.
coefficient of determination.
slope of the regression line.
standard error.
yintercept of the regression line.
The chisquare goodnessoffit test will be valid if the average of the expected cell frequencies is ______________.
between 0 and 5
less than 5
at least 5
greater than 0
at least 1
Suppose that the unadjusted seasonal factor for the month of April is 1.10. The sum of the 12 months’ unadjusted seasonal factor values is 12.18. The normalized (adjusted) seasonal factor value for April
cannot be determined with the information provided.
is equal to 1.1.
is larger than 1.1.
is smaller than 1.1.
One use of the chisquare goodnessoffit test is to determine if specified multinomial probabilities in the null hypothesis are correct.
True
False
The slope of the simple linear regression equation represents the average change in the value of the dependent variable per unit change in the independent variable (X).
True
False
The upward or downward movement that characterizes a time series over a period of time is referred to as _____________.
irregular variation
seasonal variation
a trend
cyclical variation
A major drawback of the aggregate price index is that
it is difficult to compute.
percentage comparisons cannot be made to the base year.
it does not take into account the fact that some items in the market basket are purchased more frequently than others.
it is computed by using the values from a single time series or based on a single product.
The correlation coefficient may assume any value between
0 and 1.
0 and 8.
−1 and 1.
−1 and 0.
−∞ and ∞.
The number of degrees of freedom associated with a chisquare test for independence based upon a contingency table with 4 rows and 3 columns is _____.
5
7
12
6
In simple linear regression analysis, we assume that the variance of the independent variable (X) is equal to the variance of the dependent variable (Y).
True
False
hose fluctuations that are associated with climate, holidays, and related activities are referred to as __________ variations.
trend
cyclical
seasonal
irregular
A ______________________ measures the strength of the relationship between a dependent variable (Y) and an independent variable (X).
coefficient of determination
standard error
slope
correlation coefficient
When we carry out a chisquare test of independence, the chisquare statistic is based on (r × c) − 1 degrees of freedom, where r and c denote, respectively, the number of rows and columns in the contingency table.
True
False
The correlation coefficient is the ratio of explained variation to total variation.
True
False
A multinomial probability distribution describes data that are classified into two or more categories when a multinomial experiment is carried out.
True
False
The ____________________ is the proportion of the total variation in the dependent variable explained by the regression model.
correlation coefficient
slope
coefficient of determination
standard error
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This Tutorial contains 2 Presentations
CLO Business Decision Making Project, Part 3
Prepare an 11 to 15slide Microsoft® PowerPoint® presentation for the senior management team based on the business problem or opportunity you described in Weeks 34.
I..

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Individual Assignment Final: ztest: Identify a research problem different from the previous research problems that uses two different sets of the same type of data. Example: Sales from two different months or years. GPA's of men and women. Number of two different shelf items sold (Coke &..

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Individual Assignment Final: ztest: Identify a research problem different from the previous research problems that uses two different sets of the same type of data. Example: Sales from two different months or years. GPA's of men and women. Number of two different shelf items sold (Coke &..

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In what way has the learning from this course helped you to effectively test hypotheses, draw conclusions, and provide recommendations to management? Consider what you have achieved in your research study conducted for this course.
..

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How do you know you have validated a research study based on data gathered from primary or secondary sources? Have you been involved with any product testmarketing project? Explain. How did the resulting statistics affect the product's marketing strategy? How can organizations skew the statistic..

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How would you select appropriate statistical tests for analysis research data? What aspects of research questions or data types are relevant considerations in choosing your tests? Why?
..

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Prepare an 11 to 15slide Microsoft® PowerPoint® presentation for the senior management team based on the business problem or opportunity you described in Weeks 3 and 5.
Include on the slides what you would want the audience to see (include appropriate visual aids/layout). In the Speaker Not..

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This Tutorial contains 2 Papers
CLO Business Decision Making Project, Part 2
Use the same business problem/opportunity and research variable you wrote about in Week 3.
Remember: do not actually collect any data; think hypothetically.
Develop a 1,05..

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QNT 275 Week 4 Quiz
Question 1: • Serial correlation is typically observed in:
Question 2: • Anot..

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Prepare an 11 to 15slide Microsoft® PowerPoint® presentation for the senior management team based on the business problem or opportunity you described 13 and 14
Include on the slides what you would want the audience to see (include appropriate visual aids/layout). In the..

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Resource: Case Study 12.1 in Chapter 12 of Essentials of Business Statistics.
Click the Sushi Restaurant Data Set link.
Calculate the linear regression in item 1 of the case study.
Discuss the following with your team:
Explain if simple regression or multip..

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Individual Assignment: ttest I4: Identify a research problem different from the previous research problems that uses two different sets of the same type of data. Any subject may be chosen. Some examples: Sales from two different months or years. GPA's of men and women. Number of two differe..

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What are the requirements that must be met for a regression analysis? What happens if these requirements are violated? Why is analysis of residuals important?
..

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Does correlation equal causation? Does the strength of correlation depend on the direction? What is the meaning of a zero correlation? Explain your answers.
..

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What is the difference between an independent and a dependent variable? Does a regression model imply causation? Explain why or why not.
..

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QNT 275 Week 3 Quiz
Question 1: ..

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Week 3 Learning Team Collaboration Discussion: Probability
Resource: Case Study 5.2 in Chapter 5 of Essentials of Business Statistics
Calculate the requested probabilities for items 13.
Discuss your findings for the probabilities.
What was the smok..

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Individual Assignment: Descriptive Statistics:
Identify a research problem different from the previous research problems that uses two different sets of the same type of data. Example: Sales from two different months or years. GPA's of men and women. Number of two different shelf items sold (..

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What are the characteristics of standard normal distribution? The HR department of an organization collects data on employees' age, salary, level of education, gender, and ethnicity. Which data do you think is more likely to follow normal distribution? Explain why.
..

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What are some conditions under which business decisions are made using subjective probability concepts? Provide at least two examples of subjective probability.
..

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An oil change shop advertised to change oil within 15 minutes. Based on the data collected on a typical day, what is the probability that oil change will take 15 minutes or less time? Based on the data, do you think the business claim is valid? Explain why or why not.
..

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This Tutorial contains 2 Papers
CLO Business DecisionMaking Project Part 1
Identify a business problem or opportunity at a company where you work or with which you're familiar. This will be a business problem that you use for the individual ass..

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QNT 275 Week 2 Quiz
1. In order to summarize qualitative data, a useful tool is a __________.
2. A stemandleaf diagram is constructed by separating each value of a data ..

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I2 (Week 2) Individual Assignment: Business Problem: Prepare a paper examining a business problem confronting your organization or an organization you know of that you feel could be addressed through the application of the business research process. Describe the problem. Then present the res..

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Review the following business scenario:
You are the manager in a small town in the lake district of a Midwestern state enjoys a robust tourist season during the summer months, but has only a small population of residents during the off season. The Littletown Café adjusts the levels of st..

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Select an article from a news magazine or research journal where data is displayed in a pie or bar chart. Describe the data displayed in the chart and what conclusion you could draw.
..

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What are the various methods one can use to identify the shape of data distribution collected for research study? Why it is important to know the shape of distribution? How it can be used in decision making? Provide examples other than those already posted in class.
..

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Describe a business situation, other than what has already been selected by fellow students or selected from the team assignment, where mean and standard deviation can be used in decision making. Describe how calculation of mean and standard deviation can help in making a decision.
..

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You are employed as a statistician for a company that makes household products, which are sold by parttime salespersons who work during their spare time. The company has four salespersons employed in a small town. Let us denote these salespersons by A, B, C, and D.
The sales recor..

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This Tutorial contains 2 Papers
Develop a 875word response that addresses each of the following prompts:
Define statistics with citation and reference.
Contrast quantitative data and qualitative data. Use two Peer Reviewed references.
Evaluate tables and c..

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How do we define measurement? What are various levels of measurement? How do you select measurement levels when developing a survey or data collection tool? Explain with examples.
..

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Select four variables, other than what your fellow students have already selected, that could be measured by nominal, ordinal, interval, and ratio scale. Classify them by measurement scale and select descriptive statistics that can be used to summarize data. Use the following table when posting y..

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What is the importance of statistics in business decision making? Describe a business situation where statistics was used in making a decision.
..

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1. This distribution has only one parameter. The curve is skewed to the right for small df and
becomes symmetric for large df. The entire distribution curve lies to the right of the vertical
axis. The distribution assumes nonnegative values only
1. t distribution
2. Normal distrib..

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Find z for each of the following confidence levels. Round to two decimal places.
90%
95%
96%
97%
98%
99%
For a data set obtained from a random sample, n = 81 and x = 48.25. It is known
that σ = 4.8.
What is the point estimate of μ? Round to two decim..

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Let x be a continuous random variable. What is the probability that x assumes a single value, such as a (use numerical value)?
The following are the three main characteristics of a normal distribution.
The total area under a normal curve equals _____.
A normal cu..

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List the simple events for each of the following statistical experiments in a sample space.
One roll of a die.
Note: Separate your response with a comma (,). For example 22, 23, 24
Three tosses of a coin.
Note: Use this notation for your answer. heads = H. tails = T. Fo..

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The following table lists the number of deaths by cause as reported by the Centers for Disease Control and Prevention on February 6, 2015:
Cause of Death Number of Deaths
Heart disease 611,105
Cancer 584,881
Accidents 130,557
Stroke ..

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1
To make tests of hypotheses about more than two population means, we use the:
t distribution
normal distribution
chisquare distribution
analysis of variance distribution
2
You randomly select two households and observe whether or not they own a..

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Purpose of Assignment
This assignment provided students with practice in understanding the relationship of averages and standard deviation to make an informed business decision about the gross income performance of each movie genre. Students will learn to implement the use of these stat..

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QNT 275 Week 1 Apply Connect Week 1 Exercise
Review the glossary in your textbook in preparation for this assignment.
Complete the Week 1 Exercise in Connect.
Note: You have only 1 attempt available to complete assignments.
1.
Define Ratio Variable.
..

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QNT 275 Week 2 Practice: Analysis ToolPak Installation
Complete the steps indicated in the “Installing the Analysis ToolPak” video to prepare for this week’s assignment.
Take a screenshot of the Data tab showing the installed toolpak.
Click on the Assignment Files tab t..

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QNT 275 Week 2 Practice: Connect Knowledge Check
Complete the Week 2 Knowledge Check in Connect.
Note: You have unlimited attempts available to complete practice assignments.
1.
In a statistics class, 10 scores were randomly selected with the following results: 74, 73, 77, 77..

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QNT 275 Week 2 Apply: Connect Week 2 Case
Part 1
You manage the inventory for a car dealership. Your management would like you to review current inventory on the dealership lot.
Review the Week 2 Data Set.
Create and calculate the following in Exce..

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QNT 275 Week 3 Practice: Connect Knowledge Check
1.
A plant manager knows that the number of boxes of supplies received weekly is normally distributed with a mean of 200 and a standard deviation of 20. What percentage of the time will fewer than 160 boxes of supplies arrive in a week?
..

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QNT 275 Week 3 Apply: Connect Week 3 Case
Part 1
Three hundred consumers between 21 and 49 years old were randomly selected. After sampling a new wine cooler, each was asked to rate the appeal of the phrase: “Not sweet like wine coolers, not filling like beer, and mo..

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Based on a random sample of 25 units of product X, the average weight is 102 lb and the sample standard deviation is 10 lb. We would like to ..

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Part 1
You manage Human Relations for your company. One of your sales managers has retired, l..

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QNT 275 Week 5 Apply Connect Week 5 Case
You are the manager of a retail store. You want to i..

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QNT 275 Week 1 Practice: Connect Knowledge Check
Complete the Week 1 Knowledge Check in Connect.
Note: You have unlimited attempts available to complete practice assignments.
1.
Daily temperature in a local community collected over a 30day time period is an exampl..
