Question

Refer to the accompanying data set and construct a 90% confidence interval estimate of the mean pulse rate of adult females, then do the same for all males Compare the results Click the icon to view the pulse rates for adult females and adult males Construct a 90% confidence interval of the mean pulse rate for adult females. bpm << bpm (Round to one decimal place as needed.)

I have attached 2 pictures first picture represent question and 2nd picture is the data table.

Answer 1

from data Sample mean - X = n Sample standard deuphion -s=1 Jo-1 in Female male X = 76.35 s. 13.5676 S N X = 66.925 = 12.4928 = 40 N = 40 Now as Population population mean standard is known confidence Interval for u = XI to At qot. confidence Interval do 1-0.90 = 29.10 9/2=0.05 Now dra n-2 = 39

At df = 39 and tcoios). t(0.05) = 1.68 (using t-table) (a) qoys confidence Interval for female BAL 437 + +(0.05) U= 76.35 +1.68 X 13.5676 Tuo u = 76.35 + 1.68 X 2.15 lez. 76.35 I 3.61 limt [ 72.7 ; 80.0] [ 72.7 | topm cu<[80] bpm Toy conficleute interval for male u= 7 I t(0.05) 3 - M2 66.925 11.68 12-4928 . Tuo u= 66.925 I 1.68 X 1.98 llo 66.925 + 3.33 la I 63.6 70.2] 70.2 | bpm 163.6 | bpm au < 904 cl of male pulse