# Question

How much time (in minutes) do people spend on a typical visit to a local mall? A random sample of n = 104 shoppers was timed and the results (in minutes) are stored in the data file Shopping Times.

You were asked to describe graphically the shape of the distribution of shopping times in Exercise. Now describe the shape of the distribution numerically.

a. Find the mean shopping time.

b. Find the variance and standard deviation in shopping times.

c. Find the 95th percentile.

d. Find the five-number summary.

e. Find the coefficient of variation.

f. Ninety percent of the shoppers completed their shopping within approximately how many minutes?

You were asked to describe graphically the shape of the distribution of shopping times in Exercise. Now describe the shape of the distribution numerically.

a. Find the mean shopping time.

b. Find the variance and standard deviation in shopping times.

c. Find the 95th percentile.

d. Find the five-number summary.

e. Find the coefficient of variation.

f. Ninety percent of the shoppers completed their shopping within approximately how many minutes?

## Answer to relevant Questions

A random sample for five exam scores produced the following (hours of study, grade) data values: Hours Studied (x) Test Grade (y) 3.5 ............... 88 2.4 ............... 76 4 ............... 92 5 ...A random sample of 156 grade point averages for students at one university is stored in the data file Grade Point Averages. a. Compute the first and third quartiles. b. Calculate the 30th percentile. c. Calculate the 80th ...A consignment of 12 electronic components contains 1 component that is faulty. Two components are chosen randomly from this consignment for testing. a. How many different combinations of 2 components could be chosen? b. What ...The accompanying table shows, for 1,000 forecasts of earnings per share made by financial analysts, the numbers of forecasts and outcomes in particular categories (compared with the previous year). a. Find the probability ...After meeting with the regional sales managers, Lauretta Anderson, president of Cowpie Computers, Inc., you find that she believes that the probability that sales will grow by 10% in the next year is 0.70. After coming to ...Post your question

0