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A medical research team at a certain university was interested in the effect of daily exercise on stress level in students. To obtain some information, the team surveyed a simple random sample of 400 of the more than 35,000 students attending the university. Each student reported the average number of hours spent

A medical research team at a certain university was interested in the effect of daily exercise on stress level in students. To obtain some information, the team surveyed a simple random sample of 400 of the more than 35,000 students attending the university. Each student reported the average number of hours spent

Algebra: Structure And Method, Book 1
Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter7: Applying Fractions
Section7.6: Percents Problems
Problem 5WE
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Helcampo03@gmail.c X bd AP Stats Chi Square Review O https://student.desmos.com/activitybuilder/student/606df845214c45ed11a37021#screenldx=7 Chi Square Review 70 Use this information to answer the next four questions A medical research team at a certain university was interested in the effect of daily exercise on stress level in students. To obtain some information, the team surveyed a simple random sample of 400 of the more than 35,000 students attending the university. Each student reported the average number of hours spent exercising each week and his or her perception of the effect of exercise on stress level. The data in the table below summarize the students' responses by average number of hours exercising per week (less than 5, 5 to 7, more than 7) and the perception of the effect of exercise on stress level (positive, no effect, negative). Average Time Spent Exercising 5 to 7 Hours Less Than 5 Hours per Week More Than 7 Hours per Week per Week Positive Effect 87 102 35 Perception of the Eflect of Exercise on Stress Level No Effect 95 36 Negative Effect 20 13 A chi-square test was used to determine if there is an association between the effect of exercise on stress level and the average number of hours per week that students spent exercising. Computer output resulted from performing this test is shown below. CHI-SQUARE TEST Expected counts are printed below observed counts S-7 >7 35 Total Positive 87 102 79.52 36 49 145 224 113.12 31.36 No effeet 95 139 70.195 20 18.685 202 19.46 Negative 4 13.135 142 13 5.18 56 37 Total 400 Chi-Sy = 50.1832, DF=4, P-Value = 3.306x10" ere to search a.
Transcribed Image Text:Helcampo03@gmail.c X bd AP Stats Chi Square Review O https://student.desmos.com/activitybuilder/student/606df845214c45ed11a37021#screenldx=7 Chi Square Review 70 Use this information to answer the next four questions A medical research team at a certain university was interested in the effect of daily exercise on stress level in students. To obtain some information, the team surveyed a simple random sample of 400 of the more than 35,000 students attending the university. Each student reported the average number of hours spent exercising each week and his or her perception of the effect of exercise on stress level. The data in the table below summarize the students' responses by average number of hours exercising per week (less than 5, 5 to 7, more than 7) and the perception of the effect of exercise on stress level (positive, no effect, negative). Average Time Spent Exercising 5 to 7 Hours Less Than 5 Hours per Week More Than 7 Hours per Week per Week Positive Effect 87 102 35 Perception of the Eflect of Exercise on Stress Level No Effect 95 36 Negative Effect 20 13 A chi-square test was used to determine if there is an association between the effect of exercise on stress level and the average number of hours per week that students spent exercising. Computer output resulted from performing this test is shown below. CHI-SQUARE TEST Expected counts are printed below observed counts S-7 >7 35 Total Positive 87 102 79.52 36 49 145 224 113.12 31.36 No effeet 95 139 70.195 20 18.685 202 19.46 Negative 4 13.135 142 13 5.18 56 37 Total 400 Chi-Sy = 50.1832, DF=4, P-Value = 3.306x10" ere to search a.
m/activitybuilder/student/606df845214c45ed11a37021#screenldx=8 Q6: Use the data from screen #7 6) State the null and alternative hypotheses for this test
Transcribed Image Text:m/activitybuilder/student/606df845214c45ed11a37021#screenldx=8 Q6: Use the data from screen #7 6) State the null and alternative hypotheses for this test
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