Challenge Exercises for Introduction to Statistics

Directions: Read each question below. Click once in an ANSWER BOX and type in your answer; then click ENTER. After you click ENTER, a message will appear in the RESULTS BOX to indicate whether your answer is correct or incorrect. To start over, click CLEAR.

 1 The weights of 9 students, measured in pounds, are recorded below. Find the mean weight. 135,  120,  116,  119,  121,  125,  135,  131,  123   ANSWER BOX:    RESULTS BOX:
 2 What is the range of weights given in problem 1?   ANSWER BOX:    RESULTS BOX:
 3 What is the mode of the weights given in problem 1?   ANSWER BOX:    RESULTS BOX:
 4 What is the median of the weights given in problem 1?   ANSWER BOX:    RESULTS BOX:
 5 The mean price of 5 items is \$7.00. The prices of the first four items are \$6.50,  \$8.00,  \$5.50  and \$6.00. How much does the fifth item cost?   ANSWER BOX:  \$    RESULTS BOX:
 6 The range of a set of numbers is 1,362. The greatest number is 2,172. What is the least number?   ANSWER BOX:    RESULTS BOX:
 7 The mean of a set of 7 numbers is 13. What is the sum of the numbers?   ANSWER BOX:    RESULTS BOX:
 8 Find the mode of the following test scores: 89,  78,  91,  82,  75,  89,  84,  95,  89,  93   ANSWER BOX:    RESULTS BOX:
 9 The mean of a set of data is 174.25 and the sum of the data is 1,394. How many numbers are in the set?   ANSWER BOX:    RESULTS BOX:
 10 The grade point averages of 10 students are listed below. Find the median grade point average. 3.15,  3.62,  2.54,  2.81,  3.97,  1.85,  1.93,  2.63,  2.50,  2.80   ANSWER BOX:    RESULTS BOX: