Statistics

Statistics

A.2 Homework Set: Regression & Counting Principles

Scatter Plot and Regression Analysis

Subject

Hours, x

Amount,

A

3

48

B

0

8

C

2

32

D

5

64

E

8

10

F

5

32

G

10

56

H

2

72

I

1

48

Totals

36

370

The table above is data for the number of hours a person exercises and the amount of milk a person consumes per week.

, 2 , and 2 then find the summation of these values.

1. Find the values of

2. Make a scatter plot of the values. 3. Calculate the value of r, using the formula for the correlation coefficient 4. What is the relationship between the variables? 5. Write the equation for the line, = + 6. What is the value of y when = 15 hours?

Multiplication Rules for Counting. Find the total number of outcomes in a sequence of events using the multiplication rules. 7. There are four blood types: A, B, AB, and O. Blood can also be Rh+ and Rh-. Finally, a blood donor can be classified as either male or female. How many different ways can a donor have his or her blood labeled?

8. Employees of a large corporation are to be issued special coded identification cards. The code consists of 4 letters of the alphabet. Each letter can be used up to 4 times in the code. How many different ID cards can be issued?

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