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Time (min) Too much screen time: Reese believes the students in her large high school spend way too much time on their phones and other devices. To investigate, she estimates the mean amount of daily screen time for all the students in her school by taking a random sample of 50 students. She finds the average daily screen time for the members of the sample is = 7.1 hours with a standard deviation of hours. (a) Construct and interpret a 90% confidence interval for the mean amount of daily screen time for all the students in this school. (b) A recent report stated that U.S. teens have 6.7 hours of daily screen time, on average. Does the interval from part (a) provide convincing evidence that the mean at Reese's school differs from the national average? Explain your answer. S = 2.4

Time (min) Too much screen time: Reese believes the students in her large high school spend way too much time on their phones and other devices. To investigate, she estimates the mean amount of daily screen time for all the students in her school by taking a random sample of 50 students. She finds the average daily screen time for the members of the sample is = 7.1 hours with a standard deviation of hours. (a) Construct and interpret a 90% confidence interval for the mean amount of daily screen time for all the students in this school. (b) A recent report stated that U.S. teens have 6.7 hours of daily screen time, on average. Does the interval from part (a) provide convincing evidence that the mean at Reese's school differs from the national average? Explain your answer. S = 2.4

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Too much screen time: Reese believes the students in her large high school spend way too much time on their phones and other devices. To investigate, she estimates the mean amount of daily screen time for all the students in her school by taking a random sample of 50 students. She finds the average daily screen time for the members of the sample is = 7.1 hours with a standard deviation of (a) Construct and interpret a 90% confidence interval for the mean amount of daily screen time for all the students in this school. S₂ = 2.4 hours. 35 31 (b) A recent report stated that U.S. teens have 6.7 hours of daily screen time, on average. Does the interval from part (a) provide convincing evidence that the mean at Reese's school differs from the national average? Explain your answer. 35 31 The G.O.A.T. Many people think Michael Jordan is the greatest basketball player of all time, with a career scoring average of 30.1 points per game. Some curious statistics students wondered about his scoring average for all his home games. They decided to take a random sample of 15 home games from Michael Jordan's career. Here is the number of points he scored in each of these games: 2522 24 29 28 0 32 36 40 80 Time (min) 29 26 120 32 38 27 Construct and interpret a 95% confidence interval for the mean number of points u that Michael Jordan scored in all of his home games.
Transcribed Image Text:Too much screen time: Reese believes the students in her large high school spend way too much time on their phones and other devices. To investigate, she estimates the mean amount of daily screen time for all the students in her school by taking a random sample of 50 students. She finds the average daily screen time for the members of the sample is = 7.1 hours with a standard deviation of (a) Construct and interpret a 90% confidence interval for the mean amount of daily screen time for all the students in this school. S₂ = 2.4 hours. 35 31 (b) A recent report stated that U.S. teens have 6.7 hours of daily screen time, on average. Does the interval from part (a) provide convincing evidence that the mean at Reese's school differs from the national average? Explain your answer. 35 31 The G.O.A.T. Many people think Michael Jordan is the greatest basketball player of all time, with a career scoring average of 30.1 points per game. Some curious statistics students wondered about his scoring average for all his home games. They decided to take a random sample of 15 home games from Michael Jordan's career. Here is the number of points he scored in each of these games: 2522 24 29 28 0 32 36 40 80 Time (min) 29 26 120 32 38 27 Construct and interpret a 95% confidence interval for the mean number of points u that Michael Jordan scored in all of his home games.
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