It has been observed that social media has been very attractive to millennials and has been used as a major platform where they can share their experiences, emotions, and others. A group of senior high school students is interested to know the length of time a senior high school student spends in a week browsing his or her social media account(s). The data gathered by the group is recorded in the table below. Attention Time (in hours) in a Week Given to Social Media Accounts for Random Sample of n = 50 20.7 14.0 16.7 20.7 22.5 48.2 12.1 7.7 2.9 22.2 23.5 20.3 6.4 34.0 1.3 44.5 39.6 23.8 35.6 20.0 10.9 43.1 7.1 14.3 46.0 21.9 23.4 17.5 29.4 9.6 44.1 36.4 13.8 0.8 24.3 1.1 9.3 19.3 3.4 14.6 15.7 32.5 46.6 19.1 10.6 36.9 6.7 27.9 5.4 14.0 Estimate u, the mean attention time given to social media accounts by senior high schoc tudents, using a 99% confidence interval. On the average, how many hours a day do senior hig

It has been observed that social media has been very attractive to millennials and has been used as a major platform where they can share their experiences, emotions, and others. A group of senior high school students is interested to know the length of time a senior high school student spends in a week browsing his or her social media account(s). The data gathered by the group is recorded in the table below. Attention Time (in hours) in a Week Given to Social Media Accounts for Random Sample of n = 50 20.7 14.0 16.7 20.7 22.5 48.2 12.1 7.7 2.9 22.2 23.5 20.3 6.4 34.0 1.3 44.5 39.6 23.8 35.6 20.0 10.9 43.1 7.1 14.3 46.0 21.9 23.4 17.5 29.4 9.6 44.1 36.4 13.8 0.8 24.3 1.1 9.3 19.3 3.4 14.6 15.7 32.5 46.6 19.1 10.6 36.9 6.7 27.9 5.4 14.0 Estimate u, the mean attention time given to social media accounts by senior high schoc tudents, using a 99% confidence interval. On the average, how many hours a day do senior hig

Name: school students spend browsing their social media accounts. What migh
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Description: school students spend browsing their social media accounts. What might be the implication ofthe results to the acadenmic performance of the senior high school students? 1 It has been observed that social media has been very attractive to millennials

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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Major League Baseball now records information about every pitch thrown in every game of every season. Statistician Jim Albert compiled data about every pitch thrown by 20 starting pitchers during the 2009 MLB season. The data set included the type of pitch thrown (curveball, changeup, slider, etc.) as well as the speed of the ball as it left the pitcher’s hand. A histogram of speeds for all 30,740 four-seam fastballs thrown by these pitchers during the 2009 season is shown below, from which we can see that the speeds of these fastballs follow a Normal model with mean μ = 92.12 mph and a standard deviation of σ = 2.43 mph. Approximately what proportion of these four-seam fastballs would you expect to have speeds between 88.2 mph and 94.2 mph? (Express your answer as a decimal and round to 4 decimal places.)Approximately what proportion of these four-seam fastballs would you expect to have speeds above 94.2 mph? (Express your answer as a decimal and round to 4 decimal places.)
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Major League Baseball now records information about every pitch thrown in every game of every season. Statistician Jim Albert compiled data about every pitch thrown by 20 starting pitchers during the 2009 MLB season. The data set included the type of pitch thrown (curveball, changeup, slider, etc.) as well as the speed of the ball as it left the pitcher’s hand. A histogram of speeds for all 30,740 four-seam fastballs thrown by these pitchers during the 2009 season is shown below, from which we can see that the speeds of these fastballs follow a Normal model with mean μ = 92.12 mph and a standard deviation of σ = 2.43 mph. Compute the z-score of pitch with speed 85 mph. (Round your answer to two decimal places.) Approximately what fraction of these four-seam fastballs would you expect to have speeds between 92.6 mph and 96 mph? (Express your answer as a decimal, not a percent, and round to three decimal places.) Approximately what fraction of these four-seam fastballs would you…
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