Shopping Cart
Your shopping cart is empty!
Categories
QNT 275 Week 4 Practice Set
$6.99

QNT 275 Week 4 Practice Set

This Tutorial was purchased 18 times & rated A by student like you.

 

This Tutorial contains following Attachments

  • QNT 275 N Week 4 Practice Set New.docx

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 decimal places
Make a 95% confidence interval for μ. What is the lower limit? Round to two decimal places.
Make a 95% confidence interval for μ. What is the upper limit? Round to two decimal places.
What is the margin of error of estimate for part b? Round to two decimal places.
 
 
Determine the sample size (nfor the estimate of μ for the following.
E = 2.3,  σ = 15.40, confidence level = 99%. Round to the nearest whole number.
E = 4.1,  σ = 23.45, confidence level = 95%. Round to the nearest whole number.
E = 25.9,  σ = 122.25, confidence level = 90%. Round to the nearest whole number.
 
 
True or False.
a.The null hypothesis is a claim about a population parameter that is assumed to be false until it is declared false.
 
True
False
An alternative hypothesis is a claim about a population parameter that will be true if the null hypothesis is false.
True
False
The critical point(s) divide(s) is some of the area under a distribution curve into rejection and nonrejection regions.
True
False
The significance level, denoted by α, is the probability of making a Type II error, that is, the probability of rejecting the null hypothesis when it is actually true.
True
False
The nonrejection region is the area to the right or left of the critical point where the null hypothesis is not rejected.
True
False
 
 
You are given the null hypothesis. Select the correct alternative hypothesis.
 
 
H0: μ = 5 hours, what is H1?
left-tailed test
right-tailed test
two-tail test
 
 
H0: μ = $105, what is H1?
left-tailed test
right-tailed test
two-tail test
 
 
H0: μ = $47,000, what is H1?
left-tailed test
right-tailed test
two-tail test
H0: μ = 10 minutes, what is H1?
left-tailed test
right-tailed test
two-tail test
 
 
H0: μ = 30 hours, what is H1?
left-tailed test
right-tailed test
two-tail test
 
 
Fill in the blank. The level of significance in a test of hypothesis is the probability of making a ________. It is the area under the probability distribution curve where we reject H0.
Type I error
Type II error
Type III error
 
 
Consider H0: μ = 45 versus H1: μ < 45. A random sample of 25 observations produced a sample mean of 41.8. Using α = .025 and the population is known to be normally distributed with σ = 6.
What is the value of z? Round to two decimal places.
Would you reject the null hypothesis?
Reject Ho
Do not reject Ho
 
 
The following information is obtained from two independent samples selected from two normally distributed populations.
n1 = 18      x1 = 7.82      σ1 = 2.35
 
n2 =15      x2 =5.99       σ2 =3.17
 
What is the point estimate of μ1 − μ2? Round to two decimal places.
Construct a 99% confidence interval for μ1 − μ2. Find the margin of error for this estimate.
Round to two decimal places.
 
 
 
The following information is obtained from two independent samples selected from two
populations.
 
n1 =650     x1 =1.05      σ1 =5.22
 
n2 =675     x2 =1.54         σ2 =6.80
 
Test at a 5% significance level if μ1 is less than μ2.
 
Identify the appropriate distribution to use.
t distribution
normal distribution
 
 
What is the conclusion about the hypothesis?
Reject Ho
Do not reject Ho
 
 
Using data from the U.S. Census Bureau and other sources, www.nerdwallet.com estimated that considering only the households with credit card debts, the average credit card debt for U.S. house- holds was $15,523 in 2014 and $15,242 in 2013. Suppose that these estimates were based on random samples of 600 households with credit card debts in 2014 and 700 households with credit card debts in 2013. Suppose that the sample standard deviations for these two samples were $3870 and $3764, respectively. Assume that the standard deviations for the two populations are unknown but equal.
Let μ1 and μ2 be the average credit card debts for all such households for the years 2014 and 2013, respectively. What is the point estimate of μ1 − μ2? Round to two decimal places. Do not include the dollar sign.
Construct a 98% confidence interval for μ1 − μ2. Round to two decimal places. Do not include the dollar sign.
What is the lower bound? Round to two decimal places.
What is the upper bound? Round to two decimal places.
Using a 1% significance level, can you conclude that the average credit card debt for such households was higher in 2014 than in 2013? Use both the p-value and the critical-value approaches to make this test.
Reject Ho
Do not reject Ho
 

Write a review

Order Id


Order Id will be kept Confidential
Your Name:


Your Review:
Rating:   A   B   C   D   F  

Enter the code in the box below:



Related Tutorials
$8.00

This Tutorial was purchased 8 times & rated A+ by student like you.

This Tutorial contains 2 Presentations     CLO Business Decision Making Project, Part 3   Prepare an 11- to 15-slide Microsoft® PowerPoint® presentation for the senior management team based on the business problem or opportunity you described in Weeks 3-4. I..
$12.00

This Tutorial was purchased 4 times & rated A+ by student like you.

Individual Assignment Final: z-test: 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 &..
$12.00

This Tutorial was purchased 2 times & rated A+ by student like you.

Individual Assignment Final: z-test: 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 &..
$2.50

This Tutorial was purchased 2 times & rated B+ by student like you.

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. ..
$2.50

This Tutorial was purchased 2 times & rated No rating by student like you.

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 test-marketing project? Explain. How did the resulting statistics affect the product's marketing strategy? How can organizations skew the statistic..
$2.50

This Tutorial was purchased 0 times & rated B+ by student like you.

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? ..
$9.00

This Tutorial was purchased 3 times & rated A+ by student like you.

Prepare an 11- to 15-slide 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..
$8.00

This Tutorial was purchased 9 times & rated A+ by student like you.

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..
$6.00

This Tutorial was purchased 2 times & rated A by student like you.

QNT 275 Week 4 Quiz     Question 1:      •           Serial correlation is typically observed in: Question 2:      •           Anot..
$9.00

This Tutorial was purchased 2 times & rated A+ by student like you.

Prepare an 11- to 15-slide 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..
$5.00

This Tutorial was purchased 3 times & rated A by student like you.

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..
$10.00

This Tutorial was purchased 6 times & rated A+ by student like you.

Individual Assignment: t-test 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..
$2.50

This Tutorial was purchased 2 times & rated A by student like you.

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? ..
$2.50

This Tutorial was purchased 2 times & rated A+ by student like you.

Does correlation equal causation? Does the strength of correlation depend on the direction? What is the meaning of a zero correlation? Explain your answers. ..
$2.50

This Tutorial was purchased 1 times & rated A+ by student like you.

What is the difference between an independent and a dependent variable? Does a regression model imply causation? Explain why or why not. ..
$6.00

This Tutorial was purchased 3 times & rated A+ by student like you.

QNT 275 Week 3 Quiz                                           Question 1:  ..
$5.00

This Tutorial was purchased 2 times & rated A by student like you.

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 1-3. Discuss your findings for the probabilities.    What was the smok..
$9.00

This Tutorial was purchased 4 times & rated A+ by student like you.

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 (..
$2.50

This Tutorial was purchased 2 times & rated A by student like you.

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. ..
$2.50

This Tutorial was purchased 2 times & rated A by student like you.

What are some conditions under which business decisions are made using subjective probability concepts? Provide at least two examples of subjective probability. ..
$2.50

This Tutorial was purchased 2 times & rated A+ by student like you.

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.   ..
$8.00

This Tutorial was purchased 3 times & rated A+ by student like you.

This Tutorial contains 2 Papers     CLO Business Decision-Making 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..
$6.00

This Tutorial was purchased 3 times & rated A by student like you.

QNT 275 Week 2 Quiz     1.         In order to summarize qualitative data, a useful tool is a __________. 2.         A stem-and-leaf diagram is constructed by separating each value of a data ..
$9.00

This Tutorial was purchased 4 times & rated A+ by student like you.

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..
$5.00

This Tutorial was purchased 3 times & rated A+ by student like you.

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..
$2.50

This Tutorial was purchased 2 times & rated A+ by student like you.

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. ..
$2.50

This Tutorial was purchased 2 times & rated A by student like you.

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. ..
$2.50

This Tutorial was purchased 2 times & rated A+ by student like you.

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. ..
$7.00

This Tutorial was purchased 3 times & rated A+ by student like you.

You are employed as a statistician for a company that makes household products, which are sold by part-time 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..
$6.00

This Tutorial was purchased 4 times & rated A+ by student like you.

This Tutorial contains 2 Papers   Develop a 875-word 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..
$2.50

This Tutorial was purchased 1 times & rated A+ by student like you.

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. ..
$2.50

This Tutorial was purchased 2 times & rated A by student like you.

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..
$2.50

This Tutorial was purchased 2 times & rated A by student like you.

What is the importance of statistics in business decision making? Describe a business situation where statistics was used in making a decision. ..
$30.00

This Tutorial was purchased 17 times & rated A+ by student like you.

This Tutorial contains 2 Papers for each Assignment       QNT 275 Week 1 Individual Assignment Statistics in Business (2 Papers)   QNT 275 Week 2 Individual Assignment Activity Data Set (Little Town Cafe)   QNT 275 Week 2 Assignment Mini-Pr..
$7.00

This Tutorial was purchased 10 times & rated A by student like you.

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..
$6.99

This Tutorial was purchased 18 times & rated A by student like you.

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..
$7.00

This Tutorial was purchased 5 times & rated A by student like you.

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..
$7.00

This Tutorial was purchased 2 times & rated No rating by student like you.

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..
$8.00

This Tutorial was purchased 2 times & rated A+ by student like you.

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 ..
$15.00

This Tutorial was purchased 10 times & rated A by student like you.

1 To make tests of hypotheses about more than two population means, we use the: t distribution normal distribution chi-square distribution analysis of variance distribution     2 You randomly select two households and observe whether or not they own a..
$39.00

This Tutorial was purchased 7 times & rated A+ by student like you.

This Tutorial contains 2 Papers for each Assignment       QNT 275 Final Exam Guide (New, 2017)   QNT 275 Week 1 Individual Assignment Statistics in Business (2 Papers)   QNT 275 Week 2 Individual Assignment Activity Data Set (Little Town Ca..
$8.00

This Tutorial was purchased 3 times & rated A+ by student like you.

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..
qnt275study © 2017 All Rights Reserved.Powered by:Webzindagi.