Question

Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent simple random samples selected from normally distributed populations. Also assume that the population standard deviations are equal (12) so that the standard error of the difference between means is obtained by pooling the sample variances. A researcher regularly and people who do not exercise regularly, Independent simple random samples were obtained of 16 people who do not exercise regularly and 12 people who do exercise regularly. The resting pulse rate (in beats per minute) of each person was recorded. The summary statistics are as follows was interested in comparing the resting pulse rates of people who exercise Do Not ExerciseDo Exercise x1 -735 beats/min x2-681 beats/min s1 -104 beats/min s2 -8.2beats/mun n1 16 n2-12 Construct a 90% confidence interval for the difference between the mean pulse rate of people who do not exercise regularly and the mean pulse rate of people who exercise regularly 0-081 beats/min H1- H2 11.61 beats/min -1.46 beats/min < H1 H212 26 beats/min 1.40 beats/min H1 H2 s 9.40 beats/min 0.62 beats/min H1 H2 10.18 beats/miln

Answer 1

The statistical software output for this problem is:

Hence,

90% confidence interval will be:

Option A is correct.