Statistics Solutions

(Step-by-Step) I looked at the illiteracy rates (percent of people above age 15 who cannot read) and life expectancy rates (average length of life) at some

Question: I looked at the illiteracy rates (percent of people above age 15 who cannot read) and life expectancy rates (average length of life) at some countries chosen at random:

Which should be the independent variable and which should be the dependent one? Why?

Use whichever one of these tables is the correct one to use.

x y
life expectancy illiteracy rate
Afghanistan 44 72
Australia 82 1
Bahrain 75 14
Bangladesh 63 57
Bhutan 66 53
Burkina Faso 53 78
El Salvador 72 20
Georgia 77 0
Liechtenstein 80 0
Mexico 76 9
Seychelles 73 8
Slovakia 75 0
Sweden 81 1
Taiwan 78 4
Tanzania 51 31
Uganda 52 33
Venezuela 73 7
x y
illiteracy rate life expectancy
Afghanistan 72 44
Australia 1 82
Bahrain 14 75
Bangladesh 57 63
Bhutan 53 66
Burkina Faso 78 53
El Salvador 20 72
Georgia 0 77
Liechtenstein 0 80
Mexico 9 76
Seychelles 8 73
Slovakia 0 75
Sweden 1 81
Taiwan 4 78
Tanzania 31 51
Uganda 33 52
Venezuela 7 73

Make a scatter diagram. Label the x and y axes. (Make each box be 5)

Calculate the equation of the trend line. Draw it on the graph.

Calculate r and r 2 . How strong is the relationship? Is it positive, negative, or neither?

Answer one of the next two questions.

If life expectancy is the independent variable: The life expectancy in the US is 78 years. What would you predict the illiteracy rate to be? Draw a star at that point on the graph.

If illiteracy rate is the independent variable: The illiteracy rate in the US is 1%. What would you predict the illiteracy rate to be? Draw a star at that point on the graph.

Price: $2.99
Solution: The downloadable solution consists of 5 pages
Deliverable: Word Document


∴ Other downloads you may be interested in ∴

log in to your account

Forgot password?
Don't have a membership account?
REGISTER

reset password

Back to
log in

sign up

Back to
log in