Mathematics, 13.01.2021 03:20 jamesk5671
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 97.5 mph. (Round your answer to two decimal places.)
Approximately what fraction of these four-seam fastballs would you expect to have speeds between 90.4 mph and 91.8 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 91.8 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 2% of all such pitches. Below what speed must a four-seam fastball be in order to be included in the slowest 2%? (Round your answer to the nearest 0.1 mph.)
Answers: 2
Mathematics, 21.06.2019 18:30
[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?
Answers: 1
Mathematics, 21.06.2019 20:10
21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)
Answers: 3
Mathematics, 21.06.2019 21:30
Joe has a rectangular chicken coop. the length of the coop is 4 feet less than twice the width. the area of the chicken coop is 510 square feet. what is the length of the chicken coup?
Answers: 3
Mathematics, 22.06.2019 04:00
If the equation of a line containing the midsegment of a triangle is y = -1/4x -11, what is the slope of the triangle side that is opposite the midsegment (the one not touching it). explain how you know.
Answers: 1
Major League Baseball now records information about every pitch thrown in every game of every season...
Mathematics, 24.12.2021 09:40
Mathematics, 24.12.2021 09:40
SAT, 24.12.2021 09:40
Computers and Technology, 24.12.2021 09:40
Computers and Technology, 24.12.2021 09:40
English, 24.12.2021 09:40
Mathematics, 24.12.2021 09:40