A population of n = 4 scores has a standard error of 10 points.  For the same population, what is the standard error for a sample of n = 16 scores?

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?

A population of n = 4 scores has a standard error of 10 points.  For the same population, what is the standard error for a sample of n = 16 scores?

What is the probability of randomly selecting a student with a test score less than 85 knowing that µ=80 and σ=15?

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

A distribution of scores has µ = 30, σ = 44, and is is negatively skewed. Consider the sampling distribution of the mean for samples of n = 121. a) Explain what a sampling distribution of the means (SDOM) is or how it is created. b) Then list for this sampling distribution the values for the mean and standard error of the mean, and name the shape. Mean = SE of Mean = Shape of Distribution =

Which of the following would have the highest power?

A researcher conducts a hypothesis test to evaluate the effect of a treatment that is expected to increase scores.  The hypothesis test produces a z-score of z = 2.37.  If the researcher is using a one-tailed test, what is the correct statistical decision?

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