Management at a home improvement store randomly selected 45 ...

[cdr_15]

Management at a home improvement store randomly selected 45 customers and observed their
  shopping habits. They recorded the number of items each of the customers purchased as well as
  the total time the customers spent in the store.
 
  Identify the types of variables recorded by the
  managers of the home improvement store.
  A) number of items - continuous; total time - discrete
  B) number of items - discrete; total time - discrete
  C) number of items - discrete; total time - continuous
  D) number of items - continuous; total time - continuous

Question 2

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 98 miles per hour (mph) and the standard deviation of the serve
  speeds was 13 mph. Assume that the statistician also gave us the information that the
  distribution of serve speeds was mound-shaped and symmetric. Find the percentage of
  serves that were hit faster than 72 mph.

[soda0602]

Answer to Question 1

C

Answer to Question 2

We use the Empirical Rule to determine the percentage of serves with speeds faster than 72 mph. We do this by first
finding the percentage of serves with speeds between 72 and 98 mph. The Empirical Rule states that approximately
34.0  (68/

[cdr_15]

Correct answers!

[soda0602]

Great! Please up vote