Question

Use the data consisting of IQ score and brain volume

​(cm cubed).

Find the best predicted IQ score for someone with a brain volume of

998cm cubed

.
Use a significance level of 0.05
The regression equation is
ModifyingAbove y with caret=100.2+0.00297x.
Round the​ x-coefficient to five decimal places as needed. Round the constant to two decimal places as​ needed.)
Given a brain volume of 998cm cubed the best predicted IQ score is -------
.​(Round to the nearest integer as​ needed.)

Answer 1

The best predicted IQ score is 103.

Explanation:

We are given the following regression equation:

`y=100.2+0.00297x`

where y is the predicted IQ score and x is the brain volume.

y is the dependent variable and x is the independent variable.

Significance level = 0.05

We have to find the best predicted IQ score with a brain volume of 998 cubic cm.

We put x = 998 in the equation.

`y=100.2+0.00297(998)\\y=103.16406\\y\approx 103`

Thus, the best predicted IQ score is 103.