Question

People were asked to rate a company before and after one week of reviewing the company...

People were asked to rate a company before and after one week of reviewing the company performance. The data is given in the following table

After

Before

39

32

15

11

35

21

13

17

41

30

39

38

22

14

Use an alpha of 0.05 to test whether there is a significant increase in the rating of the company after one week reviewing (rating of before is less than after). Assume that differences in ratings are normally distributed in the population.

Knowing that

D=-5.857 and SD=6.0945

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
We want to compare the average gas mileage of American-made cars vs. Japanese-made cars. The claim...
We want to compare the average gas mileage of American-made cars vs. Japanese-made cars. The claim is that the Japanese cars and American cars do not get the same gas mileage. Use the list data below to test the hypothesis that the Japanese cars and American cars do not get the same gas mileage. The American cars are in list1 and the Japanese cars in list2 below We do not know whether the mileages are normally distributed or not, but...
The manager of a landline service department wished to investigate the effect of staff development training...
The manager of a landline service department wished to investigate the effect of staff development training on the job completion rate among his staff. He selected a random sample of 30 service staff and recorded the number of completed landline services for each staff member both in the week before training and again in the week after training. Download and open the Landline.xlsx file in Excel. This file contains the number of completed landline services both before and again after...
Debates have been ongoing if a traditional classroom settings provide a more effective way to deliver...
Debates have been ongoing if a traditional classroom settings provide a more effective way to deliver educational content over more modern alternatives such as online or hybrid online course offerings. In order to shed light on this debate an experiment was conducted over a fifteen-week period. In total, 90 students were randomly separated into 3 different courses. In other words, 30 students were in a traditional classroom for a semester, 30 were asked to take the course in a hybrid...
Use the following data to test if there is a difference in mean age between mothers...
Use the following data to test if there is a difference in mean age between mothers of a boy and mothers of a girl at alpha =0.05. provide p-value     MomAge gestation sex weight preemie 35 39 F 3175 FALSE 22 42 F 3884 FALSE 35 39 F 3030 FALSE 23 40 F 3629 FALSE 23 42 F 3481 FALSE 25 38 F 2693 FALSE 25 40 F 3345 FALSE 24 40 F 3232 FALSE 19 40 F 2795 FALSE 20...
A national organization ran an advertising campaign designed to convince people to quit smoking. To evaluate...
A national organization ran an advertising campaign designed to convince people to quit smoking. To evaluate their campaign, they had subjects record the average number of cigarettes smoked per day in the week before and one week after exposure to the ad. What can be concluded with α = 0.05. The data are below. before after 35 17 12 29 18 19 27 26 16 41 46 17 21 34 31 20 34 26 27 41 a) What is the...
BMI Before BMI After 29 24 25 26 24 23 35 27 22 25 28 27...
BMI Before BMI After 29 24 25 26 24 23 35 27 22 25 28 27 26 24 27 25 26 24 23 22 21 23 21 25 24 23 25 25 24 26 32 30 26 22 30 28 25 27 25 30 You need to create two histograms: one for the pre-BMI intervention and another for the post-BMI intervention.   Please provide your interpretation of the results. For example, you might want to compare the two histograms and point...
A company has just switched to a 4-day work week. The CEO measured the number of...
A company has just switched to a 4-day work week. The CEO measured the number of units produced by 8 employees one week before and one week after the change. The CEO would like to know if there is a difference in the number of units produced. ID Before After A 25 23 B 26 24 C 27 26 D 22 23 E 29 30 F 26 24 G 29 26 H 30 32 *Note: ID is used to keep...
A fitness course claims that it can improve an individual's physical ability. To test the effect...
A fitness course claims that it can improve an individual's physical ability. To test the effect of a physical fitness course on one's physical ability, the number of sit-ups that a person could do in one minute, both before and after the course, was recorded. Ten individuals are randomly selected to participate in the course. The results are displayed in the following table. Can it be concluded, from the data, that participation in the physical fitness course resulted in significant...
A cigarette company rand an advertising campaign designed to improve sales. To evaluate their campaign, they...
A cigarette company rand an advertising campaign designed to improve sales. To evaluate their campaign, they had subjects record the average number of cigarettes smoked per day in the week before and the week after exposure to the ad. What can be concluded with an α of 0.05. The data are below. before after 46 25 21 34 31 20 34 26 27 41 35 17 12 29 18 19 27 26 16 41 a) What is the appropriate test...
To test the effect of a physical fitness course on one's physical ability, the number of...
To test the effect of a physical fitness course on one's physical ability, the number of sit-ups that a person could do in one minute, both before and after the course, was recorded. Ten individuals are randomly selected to participate in the course. The results are displayed in the following table. Using this data, find the 95% confidence interval for the true difference in the number of sit-ups each person can do before and after the course. Assume that the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT