40. For a two-tailed test, the p-value is: A) the area under the curve between the mean and the observed value of the sample statistic B) twice the area under the curve between the mean and the observed value of the sample statistic C) the area in the tail under the curve on the side which the sample statistic lies D) twice the area in the tail under the curve on the side which the sample statistic lies

The average heart rate is 80 BPM. Leon is studying the effect of a new drug, and his sample of 25 people finds an average BPM of 83 and a sample standard deviation of 8. What is the test statistic, and is this increase significant at the 5% level? Use a one sided test. A) 1.711, significant   B) 1.875, significant   C) 1.711, not significant   D) 1.875, not significant

A point estimate for the sample mean is: (select one) s, Sample standard deviation Oz, Z- score Ox, Sample mean O ME , Margin of error

A sample of 100 adult women was taken, and each was asked how many children she had. The results were as follows: Children 0 1 2 3 4 5 Number of Women 27 22 30 12 7 2 a. Find the sample mean number of children. b. Find the sample standard deviation of the number of children. c. Find the sample median of the number of children. d. What is the first quartile of the number of children? e. What proportion of the women had more than the mean number of children? f. For what proportion of the women was the num- ber of children more than one standard deviation greater than the mean? g. For what proportion of the women was the num- ber of children within one standard deviation of the mean?