In testing the difference between two population means using

In testing the difference between two population means using two independent samples, the sampling distribution of the sample  mean difference is normal if:

the populations are normal

the populations are non-normal and the sample sizes are large

the sample sizes are both greater than 30

All of the above

In (all types of) regression analysis, a variable whose value is known and is being used to explain or predict the value of another variable is called:

An independent variable

A dependent variable

A predicted variable

A response variable

If an estimated regression line has a y-intercept of 10 and a slope of 4, then when x= 2, the actual value of y is:

18

Unknown

14

15

Solution

A

A

4*2+10 = 18 A