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A Do Homework - Trevor Perry - Google Chrome Home Share A Secure https://www.mathclcom/Student/Player homework.aspx? homeworkld=454349873&questionid;=1&flushed;=true&cld;=4724730&centerwindyes; TUESDAY / THURSDAY STT 315 a copy path CopyPaste a faste shortcut Trevor Perry a I P 9/25/17 5:16 PM Clipboard Save Homework: Home work 3 - Chapter 2.5 - 2.8,2.10 This PC © Screenshots Score: 0 of 1 pt 1 of 15 (1 complete) V HW Score: 2 %, 1 of 50 pts A favorites C Desktop El Downloads Recent places 2.5-1 IE Question Help At the U.S. Open Tennis Championship a statistician keeps track of every serve that a player hits during the tournament. The statistician reported that the mean serve speed of a particular player was 105 miles per hour (mph) and the standard deviation of the serve speeds was 12 mph. Assume that the statistician also gave us the information that the distribution of the serve speeds was mound-shaped and symmetric. what proportion of the player's serves was between 117 mph and 129 mph? A OneDrive KB Homegroup 3 Trevor Perry O A. 0. 1350 O B 129 O C. 0.95 o D. 0.270 This PC I Desktop D Documents Downloads Music Pictures A Videos Local Disk A (A) Bos (CF) Gy Network A TREVOR Click to select your answer and then click Check Answer. All parts showing Clear All Final Check 0 items 0 P3 xD AN o. 5:17 PM 9 % 9/25/2017

Explanation / Answer

We will use Normal Distribution to solve the problem

P(117<X<129)

P((117-105)/12<Z<(129-105)/12)

P(1<Z<2)

P(Z<2)-P(Z<1)

= 0.1350

Option A is Correct

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