The time needed for college students to complete a certain paper and pencil maze follows a Normal distribution, with a mean of 80 seconds and a standard deviation of 6 seconds. You wish to see if the mean time is changed by meditation, so you have a group of 8 college students meditate for 30 minutes and then complete the maze. It takes them an average of = 74 seconds to complete the maze. Use this information to test the hypotheses H 0: = 80, H a: 80 at significance level = 0.02. You conclude that: a. H0 should not be rejected. b. Ha should be accepted. c. H0 should be rejected. d. this is a borderline case and no decision should be made.
The time needed for college students to complete a certain paper and pencil maze follows a Normal distribution, with a mean of 80 seconds and a standard deviation of 6 seconds. You wish to see if the mean time is changed by meditation, so you have a group of 8 college students meditate for 30 minutes and then complete the maze. It takes them an average of = 74 seconds to complete the maze. Use this information to test the hypotheses H 0: = 80, H a: 80 at significance level = 0.02. You conclude that: a. H0 should not be rejected. b. Ha should be accepted. c. H0 should be rejected. d. this is a borderline case and no decision should be made.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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The time needed for college students to complete a certain paper and pencil maze follows a
Normal distribution , with a mean of 80 seconds and a standard deviation of 6 seconds. You wish to see if the mean time is changed by meditation, so you have a group of 8 college students meditate for 30 minutes and then complete the maze. It takes them an average of = 74 seconds to complete the maze. Use this information to test the hypotheses H 0: = 80, H a: 80 at significance level = 0.02. You conclude that:a. H0 should not be rejected.b. Ha should be accepted.c. H0 should be rejected.d. this is a borderline case and no decision should be made.-
The scores on the Wechsler Adult Intelligence Scale are approximately Normal, with = 100 and = 11. The proportion of adults with scores above 110 is closest to:
a. 0.14.b. 0.25.c. 0.33.d. 0.18.
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