STATS:DATA+MODELS-W/DVD
4th Edition
ISBN: 9780321986498
Author: DeVeaux
Publisher: PEARSON
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Chapter 21, Problem 2E
a.
To determine
Define the parameter.
State the null and alternative hypotheses.
b.
To determine
Define the parameter.
State the null and alternative hypotheses.
c.
To determine
Define the parameter.
State the null and alternative hypotheses.
d.
To determine
Define the parameter.
State the null and alternative hypotheses.
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Please conduct a step by step of these statistical tests on separate sheets of Microsoft Excel. If the calculations in Microsoft Excel are incorrect, the null and alternative hypotheses, as well as the conclusions drawn from them, will be meaningless and will not receive any points.
4. One-Way ANOVA: Analyze the customer satisfaction scores across four different product categories to determine if there is a significant difference in means.
(Hints: The null can be about maintaining status-quo or no difference among groups)
H0 =
H1=
Please conduct a step by step of these statistical tests on separate sheets of Microsoft Excel. If the calculations in Microsoft Excel are incorrect, the null and alternative hypotheses, as well as the conclusions drawn from them, will be meaningless and will not receive any points
2. Two-Sample T-Test: Compare the average sales revenue of two different regions to determine if there is a significant difference.
(Hints: The null can be about maintaining status-quo or no difference among groups; if alternative hypothesis is non-directional use the two-tailed p-value from excel file to make a decision about rejecting or not rejecting null)
H0 =
H1=
Please conduct a step by step of these statistical tests on separate sheets of Microsoft Excel. If the calculations in Microsoft Excel are incorrect, the null and alternative hypotheses, as well as the conclusions drawn from them, will be meaningless and will not receive any points
3. Paired T-Test: A company implemented a training program to improve employee performance. To evaluate the effectiveness of the program, the company recorded the test scores of 25 employees before and after the training. Determine if the training program is effective in terms of scores of participants before and after the training.
(Hints: The null can be about maintaining status-quo or no difference among groups; if alternative hypothesis is non-directional, use the two-tailed p-value from excel file to make a decision about rejecting or not rejecting the null)
H0 =
H1=
Conclusion:
Chapter 21 Solutions
STATS:DATA+MODELS-W/DVD
Ch. 21.4 - Prob. 1JCCh. 21.4 - Prob. 2JCCh. 21.4 - Prob. 3JCCh. 21.5 - Prob. 4JCCh. 21.5 - Prob. 5JCCh. 21.5 - Prob. 6JCCh. 21 - Prob. 3ECh. 21 - 4. More P-values Which of the following are true?...Ch. 21 - Prob. 7ECh. 21 - 6. Alpha false and true Which of the following...
Ch. 21 - Prob. 9ECh. 21 - Prob. 10ECh. 21 - Prob. 19ECh. 21 - 10. Significant again? A new reading program may...Ch. 21 - Prob. 11ECh. 21 - Prob. 12ECh. 21 - Prob. 15ECh. 21 - 14. Another P-value Have harsher penalties and ad...Ch. 21 - Prob. 17ECh. 21 - 16. Alpha, again Environmentalists concerned about...Ch. 21 - Prob. 21ECh. 21 - Prob. 22ECh. 21 - Approval 2014 In March 2014, Barack Obama’s...Ch. 21 - Prob. 24ECh. 21 - Prob. 25ECh. 21 - Prob. 26ECh. 21 - Prob. 27ECh. 21 - Prob. 28ECh. 21 - Prob. 29ECh. 21 - Prob. 30ECh. 21 - Prob. 31ECh. 21 - 28. Alzheimer’s Testing for Alzheimer’s disease...Ch. 21 - Prob. 33ECh. 21 - 30. Quality control Production managers on an...Ch. 21 - Prob. 35ECh. 21 - Prob. 36ECh. 21 - Prob. 37ECh. 21 - 34. Stop signs Highway safety engineers test new...Ch. 21 - Prob. 39ECh. 21 - 36. Ads A company is willing to renew its...Ch. 21 - Prob. 41ECh. 21 - Prob. 42ECh. 21 - Prob. 43ECh. 21 - 40. Catheters During an angiogram, heart problems...Ch. 21 - Prob. 45ECh. 21 - 42. Catheters, again The catheter company in...Ch. 21 - Prob. 47ECh. 21 - Prob. 48ECh. 21 - Prob. 49ECh. 21 - Prob. 50ECh. 21 - Prob. 1ECh. 21 - Prob. 2ECh. 21 - Prob. 5ECh. 21 - Prob. 6ECh. 21 - Prob. 13ECh. 21 - Prob. 14E
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