3. Will the following variables have positive correlation, negative correlation,

Question

3. Will the following variables have positive correlation, negative correlation, or no correlation?

IQ and annual salary

Will these variables have positive correlation, negative correlation, or no correlation?

MULTIPLE CHOICE

a. Negative

b. No Correlation

c. Positive

4. The linear correlation between violent crime rate and percentage of the population that has a cell phone is 0.918 for years since 1995. Do you believe that increasing the percentage of the population that has a cell phone will decrease the violent crime rate? What might be a lurking variable between percentage of the population with a cell phone and violent crime rate?

Will increasing the percentage of the population that has a cell phone decrease the violent crime rate? Choose the best option below.

MULTIPLE CHOICE

a. yes

b. no

What might be a lurking variable between percentage of the population with a cell phone and violent crime rate?

MULTIPLE CHOICE

a. the economy

b. the average cell phone’s effectiveness as a weapon

c. the police

d. overall cell phone signal strength

Explanation / Answer

solution:-

3. option C. Positive

4. b. no

explanation:-  there is a lurking variable into the percentage of the population with a cell phone and the violent crime rate, the two variables' correlation does not imply causation.

=> option a. the economy

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