For numbers 18 to 21: A study was conducted using 50 undergraduates at a large private university who volunteered to participate in the research as partial fulfillment of a course requirement. One of the items studied was the maximum daily amount of alcohol consumed in the last month. Base on the data in the following table, are there differences between males and females in the maximum amount of alcohol consumed in any one day in the past month? Use 5 % level of significance. Assume equal variances. Alcohol consumed Male female Мean 8.2 5.6 Standard deviation 5.9 5.7 Number of students 20 30 18. Which of the following is the appropriate alternative hypothesis? A. There are more female participants than males B. The amount of alcohol consumed by males is higher than the amount consumed by the females. C. The amount of alcohol consumed by males and females in the past month is not the same. D. The amount of alcohol consumed by males and females in the past month is the same. 19. The pooled variance would be? А. 34.56 В. 6.73 С. 33.408 D. 5.780 20. What is the value of the test statistics? А. 1.980 В. 1.558 C. 0.270 D. 3.733 21. With to.025=±2.011; what would be your decision? A. There is no sufficient data to make a decision B. Failed to reject the null hypothesis C. Reject the null hypothesis D. Either A or B
For numbers 18 to 21: A study was conducted using 50 undergraduates at a large private university who volunteered to participate in the research as partial fulfillment of a course requirement. One of the items studied was the maximum daily amount of alcohol consumed in the last month. Base on the data in the following table, are there differences between males and females in the maximum amount of alcohol consumed in any one day in the past month? Use 5 % level of significance. Assume equal variances. Alcohol consumed Male female Мean 8.2 5.6 Standard deviation 5.9 5.7 Number of students 20 30 18. Which of the following is the appropriate alternative hypothesis? A. There are more female participants than males B. The amount of alcohol consumed by males is higher than the amount consumed by the females. C. The amount of alcohol consumed by males and females in the past month is not the same. D. The amount of alcohol consumed by males and females in the past month is the same. 19. The pooled variance would be? А. 34.56 В. 6.73 С. 33.408 D. 5.780 20. What is the value of the test statistics? А. 1.980 В. 1.558 C. 0.270 D. 3.733 21. With to.025=±2.011; what would be your decision? A. There is no sufficient data to make a decision B. Failed to reject the null hypothesis C. Reject the null hypothesis D. Either A or B
Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter38: Achievement Review—section Three
Section: Chapter Questions
Problem 6AR
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Question
ANSWER NUMBERS 18 TO 24 WRITE THE CORRECT LETTER ONLY NO NEED FOR SIOLUTIONS
Transcribed Image Text:For numbers 22 to 24 : The average length of time for the students to register for
summer classes at a certain university has been 50 minutes with a variance of 100.
A new registration procedure using computers is being tried. In a random sample
of 30 students, the mean registration time was 42 minutes. Test the hypothesis
that the average length of time for registration has been shortened due to the new
system.
22. What is the value of the test statistic?
В. 5.014
A. -4.382
C. 2.033
D. 1.584
23. At a 0.05 level of significance, what is the critical value?
А. —2.045
В. — 1.645
С. -1.96
D. -1.699
24. What can you conclude about the new system of registration?
A. There is enough evidence that the new system registration shortened the
average length of time for students to register.
B. There is insufficient evidence that the new system of registration
shortened the average length of time for students to register.
C. There is not enough data to make a conclusion
D. The new system of registration is not effective in decreasing the average
length of time for registration.
Transcribed Image Text:For numbers 18 to 21: A study was conducted using 50 undergraduates at a large
private university who volunteered to participate in the research as partial
fulfillment of a course requirement. One of the items studied was the maximum daily
amount of alcohol consumed in the last month. Base on the data in the following
table, are there differences between males and females in the maximum amount of
alcohol consumed in any one day in the past month? Use 5 % level of significance.
Assume equal variances.
Alcohol consumed
Male
female
Mean
8.2
5.6
Standard deviation
5.9
5.7
Number of students
20
30
18. Which of the following is the appropriate alternative hypothesis?
A. There are more female participants than males
B. The amount of alcohol consumed by males is higher than the amount
consumed by the females.
C. The amount of alcohol consumed by males and females in the past month
is not the same.
D. The amount of alcohol consumed by males and females in the past month
is the same.
19. The pooled variance would be?
А. 34.56
В. 6.73
С. 33.408
D. 5.780
20. What is the value of the test statistics?
A. 1.980
В. 1.558
C. 0.270
D. 3.733
21. With to.025=12.011; what would be your decision?
A. There is no sufficient data to make a decision
B. Failed to reject the null hypothesis
C. Reject the null hypothesis
D. Either A or B
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