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47) The weights (in pounds) of a random sample of 32 new born babies, born at a particular 47) hospital are given below. Find the 95% confidence interval for the mean weight of the population of new born babies borm at this hospital. 7.5 6.4 7.1 7.1 6.8 8.6 74 6.4 74 7.0 6.0 7.8 9.0 7.3 6.5 5.8 8.4 7.6 7.2 6.5 8.5 7.1 6.3 6.9 7.0 5.9 8.3 6.6 73 77 6.4 8.2
math   Statistics-And-Probability   
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Answer #1

Excel add-in (Mega Stat) procedure Step 1: In EXCEL, Select Add-Ins > Mega Stat>Descriptive Statistics. Step 2: In Input range, select the cell range Al:A33 Step 3: Check Select Defaults Step 4: Choose Mean, Sample standard deviation and Sample variance. In Confidence interval, choose 95% Step 5: Click OK. Excel add-in (Mega Stat) output: Descriptive statistics count mean sample standard deviation sample variance Sample 32 7.188 0.823 0.678 confidence interval 95,% lower confidence interval 95% upper 6.891 7.484 0.297 half-width Thus the 95% confidence interval for the mean weight of the population of new born babies born at this hospital is (6.891, 7.484).

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