Data Management Review

Data Management Review

Test is scheduled for Thursday April 18th, 2019.  If you are away at basketball on Wednesday, please complete for Thursday.

You are able to use a calculator for any of the questions. Please complete graphs on grid paper.

1. The weekly salaries of six employees at McDonalds are $140, $220, $90, $180, $140, $200. For these six salaries, find: (a) the mean (b) the median (c) the mode  


2. Andy has grades of 84, 65, and 76 on three math tests.  What grade must he obtain on the next test to have an average of exactly 80 for the four tests?

3. Test scores for a class of 20 students are as follows:
93, 84, 97, 98, 100, 78, 86, 100, 85, 92, 72, 55, 91, 90, 75, 94, 83, 60, 81, 95 
4.  Complete the tally chart to represent the data above. 

Test Scores	Frequency
91-100
81-90
71-80
61-70
51-60

What is the mean test score?

What is the median? 

What is the mode?

5. Use a double bar graph to display the data below.

6. Define the term correlation. Give examples of variables that may have a positive, negative and no correlation. Do the scatter plots below show positive, negative or no correlation?  
a) 
 
b) 
 
c)

 7. Using the graph below draw some conclusions about the data.

8. Create a scatter plot using the data below. 

   * Hint put hours slept on horizontal axis and math scores on vertical axis   

9.  Create a stem and leaf plot graph for the data below

10. Use the data below to create a double line graph. **NOTE- Time will on the X Axis (horizontal)