Question

Question 8 

At a tennis tournament a statistician keep track of every serve. The statistician reported that the mean serve speed of a particular player was 104 miles per hour (mph) and the standard deviation of the serve speeds was 8 mph. Assume that the statistician also gave us the information that the distribution of the serve speeds was bell shaped. Using empirical rule what percent of players speeds are between 96 mph and 120 mph? 

• 99.7 

• 83.85 

• 97.5 

• 81.5 

Question 9 

There are 30 people in a class and 5 people are chosen randomly to go on a trip, in how many ways can these 5 people be chosen? 

• 142506 

• 17100720 

• 6

• 1