Question 14 Your answer is CORRECT. The one-sample t statistic for a test of H0: μ= 13 vs. Ha: μ< 13 based on n= 17 observations has the test statistic value of t= −1.45. What is the p-value for this test?
a) 0.083 b) 0.383 c) 0.166 d) 0.917 e) 0.000
Question 15
Your answer is CORRECT.
This is a written question, worth 10 points. DO NOT place the problem code on the answer
sheet. A proctor will fill this out after exam submission. Show all steps (work) on your
answer sheet for full credit.
Problem Code: 1583 A study of iron deficiency in infants compared samples of infants whose mothers chose different ways of feeding them. One group contained breast-fed infants. The children in another group were fed a standard baby formula without any iron supplements. Her are summary results on blood hemoglobin levels at 12 months of age: Group nxBreast-fed 25 15.4 Formula 32 17.1 Part a: We want to see if the mean hemoglobin level is greater among formula-fed babies. State the hypotheses and perform the significance test on your hypothesis. Report the test statistic and p-value. State your conclusion in terms of the issue. Part b: Give a 95% confidence interval for the mean difference in hemoglobin level between the two populations of infants.
s
2.2
1.9
a)
I have placed my work and my answer on my answer sheet.

b)
I want to have points deducted from my test for not working this problem.
Question 16
Your answer is CORRECT.
This is a written question, worth 10 points. DO NOT place the problem code on the answer
sheet. A proctor will fill this out after exam submission. Show all steps (work) on your
answer sheet for full credit.
Problem Code: 1671 Consumer Reports rated 77 cereals on a scale of 0 to 100. The number of grams of sugar contained in each serving of the corresponding cereals was also recorded. Using sugar as the explanatory variable and the Consumer Reports rating as the dependent variable, computer output of the data is as follows (the p-values are intentionally left blank): Predictor Coef StDev Constant 59.28 1.948 30.43 Sugars − 2.41 0.24 − 10.12 S = 9.146 R-Sq = 57.7% R-Sq(adj) = 57.1% Part a:What is the regression equation? Part b:Calculate the 95% confidence interval of the slope of the regression line for all cereals. Part c:Use the information provided to test whether there is a significant relationship between the sugar content and the Consumer Report rating at the 5% level.
T
P
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a)
I have placed my work and my answer on my answer sheet.
b)
I want to have points deducted from my test for not working this problem.