Stat Practice One

What could be the relationship statement for this scatter plot?

• Ice cream sales depend on temperature.

• As the outside temperature increases, the ice cream sales increase.

• As the outside temperature decreases, the ice cream sales increase.

• There is no relationship between sales and temperature.

Which of the following only involves quantitative variables?

• age versus race

• number of siblings versus types of pets

• number of family members vs types of vacation

• years of experience versus amount of money saved

The regression line equation for this date is y = 1.4x + 47. What does the y-intercept represent in this scenario?

• Students studied an average of 47 minutes

• Students scored an average of 47 points when they studied

• Students earned 1.4 more points when studying

• Students who studied 0 minutes, earned an average of 47 points.

Tags

CCSS.HSF.LE.B.5

Describe the type of correlation in this scatter plot.

• Positive

• Negative

• No correlation

• Very strong

A positive correlation between two variables means...

• that as one variable increases, the other variable also increases

• that as one variable increases, the other variable decreases

• that as one variable decreases, the other variable increases

• the two variables are happy

A negative correlation between two variables means...

• that as one variable increases, the other variable also increases

• that as one variable increases, the other variable decreases

• that as one variable decreases, the other variable also decreases

• the two variables are unhappy

Which of the following variables would be quantitative data?

• Race

• Eye Color

• Hair color

• Height

Which of the following variables would be qualitative data?

• Gender

• Age

• Blood pressure

• Resting heart rate