Author: Anonymous

A normal distribution has a mean of µ = 40 with σ = 10.  What proportion of the scores in this distribution are smaller than X = 35?

Which of the following is directly addressed by the null hypothesis?

What is the probability of randomly selecting a student with a test score greater than 90 knowing that µ=80 and σ=15?

What proportion of a normal distribution is located between z = –0.25 and z = +0.25?

A normal distribution has a mean of µ = 40 with σ = 10.   What proportion of the scores in this distribution are greater than X = 55?

A coin has been flipped 20 times in a row and landed on heads each time. Kirby bets all his savings that this time it must land on tails. What is the probability of the coin landing on tails?

Which of the following statements about power is false?

Even if a treatment has an effect, it is still possible to obtain a sample mean that is very similar to the original population mean.  What outcome is likely if this happens?

What proportion of a normal distribution is located in the tail beyond z = 2.00?

Statistical power is the probability that a statistical test will  ________