A vertical line is drawn through a normal distribution at z = 1.20.  What proportion of the distribution is on the left-hand side of the line?

A sample of n = 25 individuals is selected from a population with µ = 80 and a treatment is administered to the sample.  What is expected if the treatment has no effect?

What proportion of a normal distribution is located in the tail beyond z = –1.00?

On Halloween, Oprah puts candy out in a bowl – there are 20 Reese’s, 25 Junior Mint boxes, and 15 Laffy Taffys. When the first trick-or-treater comes by, what is the probability they choose a Junior Mint Box?

What z-score values form the boundaries for the middle 60% of a normal distribution?

What proportion of a normal distribution is located between z = –1.50 and z = +1.50?

What does it mean for a z-score for a sample mean, or a test statistic, to be statistically significant?

What z-score value separates the top 10% of a normal distribution from the bottom 90%?

On Halloween, Oprah puts candy out in a bowl – there are 20 Reese’s, 25 Junior Mint boxes, and 15 Laffy Taffys. When the first trick-or-treater comes by, what is the probability they choose a Laffy Taffy?

The complement of the null hypothesis is the _______.