Asked by Paulo
2. The following is a random sample of grades achieved on statistics examination by 10 male students in a very large class and a random sample of grades achieved by 8 female students.
Male 78 87 75 64 90 80 65 86 74 81
Female 71 50 80 75 90 61 85 81
Test at = 0.01 level to test whether the difference between the means of these two samples is significant.
Male 78 87 75 64 90 80 65 86 74 81
Female 71 50 80 75 90 61 85 81
Test at = 0.01 level to test whether the difference between the means of these two samples is significant.
Answers
Answered by
Paulo
Generate an SPSS output and write the 5-step solutions for each of the following problems. All answers should be in two-decimal places:
1. A non-government consumer protection agency wants to test the credibility of the manufacturer's claim that the average capacity is 140 ampere-hours. To test the claim, 20 batteries from a recently produced batch were tested. The results, in ampere-hours are as follows:
140.0 137.5 138.9 140.0 144.0 139.1
141.9 137.4 133.6 138.2 140.1 139.6
136.8 137.3 35.0 139.0 141.3 140.6
135.3 134.2 Test at = 0.05
2. The following is a random sample of grades achieved on statistics examination by 10 male students in a very large class and a random sample of grades achieved by 8 female students.
Male 78 87 75 64 90 80 65 86 74 81
Female 71 50 80 75 90 61 85 81
Test at = 0.01 level to test whether the difference between the means of these two samples is significant.
3. To reduce the number of plant accidents. BLBTZ Co. implemented a new safety program for employees. To determine its effectiveness the number of accidents a week was recorded before and after the program was implemented.
Week 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th
Before 12 10 9 15 11 8 16 13 14 20
After 10 9 12 8 6 10 12 7 5 11
Test at - 0.05 if the new safety program is effective in reducing accidents.
4. The following are the number of minutes it took a random sample of 10 men and 12 women applicants to complete applications for employment at the human resource department of ABC Corporation.
Men: 19.4 18.5 19.8 18.9 21.0 18.7 19.6 18.3 19.5 17.9
Women: 20.0 19.6 21.3 18.5 25.7 30.1 19.6 22.4 20.3 25.9 26.0 15.8
Test at 0.01 level if there is a significant difference in the mean number of minutes used by the
two groups of applicants.
1. A non-government consumer protection agency wants to test the credibility of the manufacturer's claim that the average capacity is 140 ampere-hours. To test the claim, 20 batteries from a recently produced batch were tested. The results, in ampere-hours are as follows:
140.0 137.5 138.9 140.0 144.0 139.1
141.9 137.4 133.6 138.2 140.1 139.6
136.8 137.3 35.0 139.0 141.3 140.6
135.3 134.2 Test at = 0.05
2. The following is a random sample of grades achieved on statistics examination by 10 male students in a very large class and a random sample of grades achieved by 8 female students.
Male 78 87 75 64 90 80 65 86 74 81
Female 71 50 80 75 90 61 85 81
Test at = 0.01 level to test whether the difference between the means of these two samples is significant.
3. To reduce the number of plant accidents. BLBTZ Co. implemented a new safety program for employees. To determine its effectiveness the number of accidents a week was recorded before and after the program was implemented.
Week 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th
Before 12 10 9 15 11 8 16 13 14 20
After 10 9 12 8 6 10 12 7 5 11
Test at - 0.05 if the new safety program is effective in reducing accidents.
4. The following are the number of minutes it took a random sample of 10 men and 12 women applicants to complete applications for employment at the human resource department of ABC Corporation.
Men: 19.4 18.5 19.8 18.9 21.0 18.7 19.6 18.3 19.5 17.9
Women: 20.0 19.6 21.3 18.5 25.7 30.1 19.6 22.4 20.3 25.9 26.0 15.8
Test at 0.01 level if there is a significant difference in the mean number of minutes used by the
two groups of applicants.