Question

Six pairs of data yield r = 0.344 and the regression equation y=5x+2. Also, y=18.3 What is the best predicted value of y for x = 5? Use α = 0.05 27 93.5 4.22 18.3

Answer 1

Answer:

18.3

Explanation:

First, determine if x and y are linear correlated.

Since the correlation coefficient, r = 0.344 is between -0.878 and +0.878, we conclude that there is no linear correlation between x and y.

In this scenario, the best predicted value of y is the mean of y.

Since we are given the mean of y:

$\bar{y}=18.3$

The correct answer is 18.3.