4.what is the significance of a correlation coefficient of 0.3?

a.

the points all lie very close to the line of fit, and the line is decreasing.

b.

the points all lie very close to the line of fit, and the line is increasing.

c.

the points do not follow the line of fit, and the line is decreasing.

d.

the points do not follow the line of fit, and the line is increasing.

D.

The points do not follow the line of fit, and the line is increasing.

Step-by-step explanation:

Given that correlation coefficient between two variables x and y is 0.30

This implies that there is a positive relationship in other words, when x increases y increases.

Since r is close to 0 than to 1, there is a weak correlation only.

So all points will not lie very close to the line.

There will be positive slope and hence line would be increasing.

Out of the four options correct option would be that which says all points do not follow line of fit and line increases

So option d is right

D.

The points do not follow the line of fit, and the line is increasing.

the data of the detroit pistons in numerical order from least to greatest is 0.30, 0.37, 0.55, 0.62, 0.69, 0.72, 0.73, 0.75, 0.77, 0.78, 0.80, 0.81, 0.81, 0.83, 0.84, 0.89

the data of the miami heat in numerical order from least to greatest is 0.50, 0.50, 0.56, 0.57, 0.67, 0.72, 0.72, 0.72, 0.75, 0.75, 0.76, 0.81, 0.82, 0.90, 1.00, 1.00

the detroit pistons median : 1.52

the miami heat median: 1.47

the iqr of this data is 0.05

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.