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If I am z-scoring a raw score of 65 and the mean is 65, what will the z-score equal?

Ten years ago, only 15% of the U.S. population consisted of people more than 65 years old.  A researcher plans to use a sample of n = 300 people to determine whether the population distribution has changed during the past ten years.  If a chi-square test is used to evaluate the data, what is the expected frequency for the older-than-65 category?

What is not an assumption of an independent samples t test

For the following distribution, what is the width of each class interval?X              f20-24   215-19   510-14   45-9         1

Suppose the correlation between height and weight for adults is +0.40.  What proportion (or percent) of the variability in weight can be explained by the relationship with height?

For an independent samples t-test, the null hypothesis states _____.

What is the estimated standard error for the sample mean when n=31 and SS=1010?

Which of the following is UNTRUE of z-scores?

Which measure of central tendency will be most affected by an outlier?

For linear regression calculated for a sample of n = 20 pairs of X and Y values, what is the value for degrees of freedom for the unpredicted portion of the Y-score variance, MSresidual?