Question

528. 1) 5,36 + (-3,28) - 1,78; 3) -6,9 + 0,205 - (-4,155); 5) 4,878,54 + 3,12; 2) 29,04 121,4 - 43,52; 4) -7 -1,38 - (-4,96); 6) 45,006- 52,29 + (-2,306). -​

Answer 1

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PART II: DO ONLY (4) QUESTIONS (18 Marks) 1. Calculate the confidence interval to estimate the population proportion for each of the following. If 95% confidence level; n = 9 and hat p = 0.2

2. Compute sample size (n) needed to estimate the mean of a normally distributed population If ME = 0.3 sigma = 20 and alpha = 0.05

3. Assume a normal distribution with known population variance sigma . Calculate the LCL for given overline X = 20 n = 64 ; sigma = 11 and alpha = 0.05

4. Calculate the margin of error to estimate the population mean, u. Assumed that 99% confidence level; n = 49 and sigma = 12

5. A dependent random sample from two normally distributed populations gives the following n = 36 overline d = 4 and S_{d} = 3 . Find the 90% confidence interval for the difference between the means of the two populations.

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