1. I took a sample of the grade point averages for students in my class. For 25 students, the standard deviation of grade points was 0.65 and the mean was 2.89. The standard error for the sample was:

0.13 Right.

To find the standard error for the sample, you can use the formula:

Standard Error = Standard Deviation / √(Sample Size)

In this case, the standard deviation of the grade points is given as 0.65 and the sample size is 25 students.

Plugging in these values into the formula:

Standard Error = 0.65 / √(25)

To calculate the square root of 25, we know that the square root of 25 is 5.

Therefore:

Standard Error = 0.65 / 5

Dividing 0.65 by 5, we get:

Standard Error = 0.13

So, the standard error for the sample is 0.13.