What best describes the association between variables a and b? select the correct choice.
no association
a negative linear association
a positive linear association
a nonlinear association

option: B is correct.

( A positive linear association )

Step-by-step explanation:

The association that best describes between variable A and variable B is:

a positive linear association.

it is positive as the points are continuously increasing and also and also we can draw a straight line such that it covers some of the points of the plot and exclude some points.

Hence, the relationship is:

A positive linear association.

Mean is the measure of central tendency is most appropriate to describe the given data.

Step-by-step explanation:

We are given the following in the question:

The distribution of time in seconds is a bell shaped distribution that is a normal distribution.

Properties of a normal distribution:

The mean, mode and median for a normal distribution are equal.The mean divides the data into two equal parts.The area under the graph is 1.Thus, mean is the most appropriate measure of central tendency for normally distributed data.

Thus, the correct answer is

Mean is the measure of central tendency is most appropriate to describe the given data.