program for camper tha measuroments ane shown in the tabile to the right Complet

Question

program for camper tha measuroments ane shown in the tabile to the right Complete parts a trough h t centers on nutrion educaion and physical adtivily, In a ecent study, the body mass index (BMI) was measured for each of 78 campers both at the start and end of Mean Deviation Ending BMI 304 56 Diferences 37 14 a. Give the null and abenative hypotheses for Let pr be the population mean Bi at the start of camo /2 be the population mean Bi at the end of camp, and oP- determining whether the mean BMil at the and of camp is less than he mean BuI at the slart of camp Choose the answer beiow est becmuse the sample sire is greater Than 30. By the Central Limit Theoem, this condition guarantees the s sfitillbeapsimalely romal were not paired oniginally, paining then D. samples 1test because the sample of difflenances was chosen randomly Use an using the formula for (Round to two decimal piaces as needed) 4

Explanation / Answer

a)
H0: mu(d) <= 0
H1: mu(d) > 0

b) paired t-test (option C)

c)

d)

e) Option B.

f) Reject H0 because the p-vlue is less than the significance level. There is sufficient evidence that the mean BMI at the end of camp is less than the mean BMI at the start of the camp.

g) Option (B)

h)

The true mean diffierence between the BMI at the start of camp and the BMI at the end of the camp falls withing the limits of the interval with 99% confidence. Since 0 is not included in the interval, there is sufficient evidence that the mean BMI at the end of camp is less than the mean BMI at the start of the camp.

x1(bar) 34.10 x2(bar) 30.40 s1 5.90 s2 5.60 n1 78 n2 78 SE = sqrt[ (s12/n1) + (s22/n2) ] (s12/n1) 0.4463 (s22/n2) 0.4021 SE 0.9211 DF = (s12/n1 + s22/n2)2 / { [ (s12 / n1)2 / (n1 - 1) ] + [ (s22 / n2)2 / (n2 - 1) ] } [ (s12 / n1)2 / (n1 - 1) ] 0.003 [ (s22 / n2)2 / (n2 - 1) ] 0.00 (s12/n1 + s22/n2)2 0.72 DF = 154

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.