Author Question: A teacher reports that the class scores are generally distributed according to a bell curve. This ... (Read 129 times)

brutforce · **on:** Jul 31, 2018

A teacher reports that the class scores are generally distributed according to a bell curve. This means:

a. the mean, median, and mode have different values
b. the left half and the right half are not symmetrical
c. approximately 95 of the scores fall between -1 and +1 standard deviation from the mean
d. 100 of the scores fall between -3 and +3 standard deviations from the mean

Question 2

A researcher determines that there is a positive correlation between sleep and test scores. This means as the amount of sleep is increased then test scores:

a. increase
b. decrease
c. remain the same
d. cannot be determined