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Compute the z-score of pitch with speed 91.3 mph. (Round your answer to two decimal places.) pproximately what fraction of these four-seam fastballs would you expect to have speeds between 0.7 mph and 94.7 mph? (Express your answer as a decimal, not a percent, and round to three ecimal places.) pproximately what fraction of these four-seam fastballs would you expect to have speeds above 4.7 mph? (Express your answer as a decimal, not a percent, and round to three decimal places.) paseball fan wishes to identify the four-seam fastballs among the slowest 14% of all such pitches. low what speed must a four-seam fastball be in order to be included in the slowest 14%? (Round ur answer to the nearest 0.1 mph.)

Compute the z-score of pitch with speed 91.3 mph. (Round your answer to two decimal places.) pproximately what fraction of these four-seam fastballs would you expect to have speeds between 0.7 mph and 94.7 mph? (Express your answer as a decimal, not a percent, and round to three ecimal places.) pproximately what fraction of these four-seam fastballs would you expect to have speeds above 4.7 mph? (Express your answer as a decimal, not a percent, and round to three decimal places.) paseball fan wishes to identify the four-seam fastballs among the slowest 14% of all such pitches. low what speed must a four-seam fastball be in order to be included in the slowest 14%? (Round ur answer to the nearest 0.1 mph.)

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
Section10.6: Summarizing Categorical Data
Problem 23PPS
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Compute the z-score of pitch with speed 91.3 mph. (Round your answer to two decimal places.) Approximately what fraction of these four-seam fastballs would you expect to have speeds between 90.7 mph and 94.7 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 expect to have speeds above 94.7 mph? (Express your answer as a decimal, not a percent, and round to three decimal places.) A baseball fan wishes to identify the four-seam fastballs among the slowest 14% of all such pitches. Below what speed must a four-seam fastball be in order to be included in the slowest 14%? (Round your answer to the nearest 0.1 mph.) mph
Transcribed Image Text:Compute the z-score of pitch with speed 91.3 mph. (Round your answer to two decimal places.) Approximately what fraction of these four-seam fastballs would you expect to have speeds between 90.7 mph and 94.7 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 expect to have speeds above 94.7 mph? (Express your answer as a decimal, not a percent, and round to three decimal places.) A baseball fan wishes to identify the four-seam fastballs among the slowest 14% of all such pitches. Below what speed must a four-seam fastball be in order to be included in the slowest 14%? (Round your answer to the nearest 0.1 mph.) mph
Major League Baseball now records information about every pitch thrown in every game of 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 u = 92.12 mph and a standard deviation of o = 2.43 mph. every 85 90 95 100 speed (mph) counts
Transcribed Image Text:Major League Baseball now records information about every pitch thrown in every game of 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 u = 92.12 mph and a standard deviation of o = 2.43 mph. every 85 90 95 100 speed (mph) counts
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