1)If you fail to reject the null hypothesis when the alternative is true, then you have

a.Committed a Type I error

b.Committed a Type II error

c.Made the correct decision

d.There is not enough information to answer this question

2) The number of medications taken by adults 65 and older has a mean of 10.4 and a standard deviation of 4.8. If a sample is taken of 200 adults 65 and older, what are the mean and standard deviation of the sampling distribution?"

3) A laboratory scale is known to have a standard deviation of =0.005 grams in repeated weighings.If scale readings in repeated weighings are normally distributed, how many times must you weigh a specimen on this scale in order to have the width of the confidence interval be no larger than 0.001 grams with 95% confidence?

4) If the margin of error is exactly 5 for a 95% confidence interval for the mean, where a sample of 15 is taken from data that are normally distributed and the population variance is known, what is the standard error for the mean?