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: