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(a) Use the survey result to give a 99% confidence inter- val for the mean study time of all first-year students. (b) What condition not yet mentioned must be mer for your confidence interval to be valid? America

(a) Use the survey result to give a 99% confidence inter- val for the mean study time of all first-year students. (b) What condition not yet mentioned must be mer for your confidence interval to be valid? America

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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CHAPT 40 Student study times. A class survey in a large class for (b) What condition not yet mentioned must be met for your confidence interval to be valid? ing ES cal basis we apply first-year college students asked, “About how hours do you study during a typical week?" The mean ve know many onstruct response of the 463 students was x = 13.7 hours Sun- pose that we know that the study time follows a Normal %3D distribution with standard deviation o = 7.4 hours in %3D the population of all first-year students at this university online (a) Use the survey result to give a 99% confidence inter- hapter: val for the mean study time of all first-year students. ques- (0) What condition not vet mentioned must be mer for addi- to 1620 America
Transcribed Image Text:CHAPT 40 Student study times. A class survey in a large class for (b) What condition not yet mentioned must be met for your confidence interval to be valid? ing ES cal basis we apply first-year college students asked, “About how hours do you study during a typical week?" The mean ve know many onstruct response of the 463 students was x = 13.7 hours Sun- pose that we know that the study time follows a Normal %3D distribution with standard deviation o = 7.4 hours in %3D the population of all first-year students at this university online (a) Use the survey result to give a 99% confidence inter- hapter: val for the mean study time of all first-year students. ques- (0) What condition not vet mentioned must be mer for addi- to 1620 America
Explain why this is true. 7.30 Hotel managers' personalities. Successful hotel man- agers must have personality characteristics tradition- ally stereotyped as feminine (such as "compassionate") as well as those traditionally stereotyped as masculine (such as "forceful"). The Bem Sex-Role Inventory (BSRI) is a personality test that gives separate ratings for "female" and "male" stereotypes, both on a scale of 1 to 7. Although the BSRI was developed at a time >> when these stereotypes were more pronounced, it is still widely used to assess personality types. Unfortunately, the ratings are often referred to as femininity and mas- culinity scores. A sample of 148 male general managers of three- star and four-star hotels had mean BSRI femininity score x = 5.29.6 The mean score for the general male population is u = 5.19. Do hotel managers, on the average, differ statistically significantly in femininity score from men in general? Assume that the standard
Transcribed Image Text:Explain why this is true. 7.30 Hotel managers' personalities. Successful hotel man- agers must have personality characteristics tradition- ally stereotyped as feminine (such as "compassionate") as well as those traditionally stereotyped as masculine (such as "forceful"). The Bem Sex-Role Inventory (BSRI) is a personality test that gives separate ratings for "female" and "male" stereotypes, both on a scale of 1 to 7. Although the BSRI was developed at a time >> when these stereotypes were more pronounced, it is still widely used to assess personality types. Unfortunately, the ratings are often referred to as femininity and mas- culinity scores. A sample of 148 male general managers of three- star and four-star hotels had mean BSRI femininity score x = 5.29.6 The mean score for the general male population is u = 5.19. Do hotel managers, on the average, differ statistically significantly in femininity score from men in general? Assume that the standard
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