When determining whether there is a correlation between two

When determining whether there is a correlation between two variables, one should use a _______________ to explore the data visually.

a. protractor

b. probability distribution

c. correlation coefficient

d. scatter plot

Correlation implies causality.

True

False

4. If outliers (extremely large or small numbers in our distribution of numbers) are observed only among the highest values in a batch of data, the shape of the distribution of numbers is

A. symmetrical

B. negatively skewed

C. right skewed

D. left skewed

6. Which of the following do not reflect the need for statistical sampling?

A. it may be too costly to deal with the entire population

B. it may be too difficult or cumbersome to deal with the entire population

C. it may be too time consuming to deal with the entire population

D. the analysis of the data may be destructive in nature

E. none of the above

Solution

1. When determining whether there is a correlation between two variables, one should use a _______________ to explore the data visually.

D. SCATTER PLOT. It graphs your data so you can inspect if there is a trend.

2.

FALSE. Correlation DOES NOT imply causality.

4..

It is RIGHT SKEWED. [OPTION C]

6.

E. none of the above