Category: Uncategorized

Which of the following is an accurate definition for the power of a statistical test?

A sample of n = 16 scores is selected from a population with µ = 100 and σ = 32.  If the sample mean is M = 104, what is the z-score for this sample mean?

Even if a treatment has no effect, it is still possible to obtain an extreme sample mean that is very different from the population mean.  What outcome is likely if this happens?

Scores on the SAT form a normal distribution with a mean of µ = 500 with σ = 100.  If the state college only accepts students who score in the top 60% on the SAT, what is the minimum score needed to be accepted?

Anna has 25 jellybeans in a bag. 5 are red, 3 are yellow, 7 are green, and 10 are purple. If Anna picks 4 jellybeans out of the bag without replacing them, and 1 is red, 1 is green, and 2 are purple, what is the probability she picks a yellow jellybean on her next draw?

When is there a risk of a Type II error?

A random sample of n = 4 scores is obtained from a population with a mean of 80 and a standard deviation of 10.  If the sample mean is M = 90, what is the z-score for the sample mean?

Which of the following is an accurate definition for the power of a statistical test?

Students in Dr. Gallimore’s class took an exam: the mean was an 85 with a standard deviation of 2. What was the proportion of students who received an exam score between 88 and 92?

A sample of n = 16 scores is selected from a population with µ = 100 and σ = 32.  If the sample mean is M = 104, what is the z-score for this sample mean?