HonorsExam3

# HonorsExam3 - STA 2023 Honors Name Exam 3 UF ID 1 How...

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STA 2023 Honors Name ____________________________ Exam 3 UF ID# ___________________________ 1. How involved are students in extracurricular activities – clubs, organized sports, social or religious groups, student government? A survey asked a random sample of students questions related to their extracurricular activities. Each of the five situations presented below describes an inference that we would like to make about a different parameter. Match each of the five situations below with the parameter of interest from the list: (10 pts) a) one mean b) one proportion c) difference of two independent means d) difference of two independent proportions e) mean of paired differences ___ Compare the average number of hours per week spent on extracurricular activities for upperclassmen (Juniors and Seniors) and underclassmen (Freshmen and Sophomores). ___ Compare the average number of hours per week spent on extracurricular activities for each student now and when they were in high school. ___ We discover that 23 out of 150 students in the sample are involved in four or more organizations. ___ We note that 15 out of 75 men and 18 out of 75 women in our sample are not involved in any organizations. ___ We find that, on average, students are involved in 1.7 different organizations. 2. Several recent best seller books were selected and their prices compared at two websites: BAMM.com (Books a Million) and Borders.com. We will compare their prices with a matched pairs p r o c e d u r e : ( 2 0 p t s ) Item BAAM.com Borders.com Cesar's Way 16.08 24.95 The World Is Flat 17.67 30.00 State of Denial 21.00 30.00 Ultrametabolism 32.95 29.95 An Inconvenient Truth 16.10 23.00 Nineteen Minutes 15.57 18.86 Oracle Bones 17.97 26.95 The Wal-Mart Effect 10.00 15.00 The Omnivore's Dilemma 17.37 26.95

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a) Compute the mean and standard deviation of the differences: x = ____________ s= ____________ (4 pts) Note : If you don’t know how to do this, use x = - 7 and s = 4.4 for the rest of the problem. b)
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HonorsExam3 - STA 2023 Honors Name Exam 3 UF ID 1 How...

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