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Unformatted text preview: Sarah Anderson Stats week 9 Exercises 18 (page 348) Exercise 28 (page 355) 2.) Standard error of Mean = Standard deviation / sq rt n = 3 / sq rt 36 = 3 /6 = 0.5 (O-E) / S.E = (12 -10) / 0.5 = 4 Critical value at .02 level of significance = 2.33 Since the calculated value (4) is greater than the critical value (2.33) the Null hypothesis will be rejected. 4.) Standard error of Mean = Standard deviation / sq rt n S.D = 15 and n = 64 S.E of Mean = 15/sq rt 64 = 1.875 I think in case of Ho Mu is >/= 210 (O-E)/S.E = (215 - 210) / 1.875 = 2.67 Critical value at .03 significance level = 2.17 Since the calculated value (2.67) is > the critical value (2.17) the null hypothesis will be rejected. 6.) H0 : µ = 3 (that is what it should be) H1 : µ < 3 (because we believe it is lower) (this is a one sided test) What we do next is to calculate the p-value that belongs to our sample. The p-value gives us the probability that we would have measured the outcome in our sample if H0 is TRUE. Or in other words, probability that we would have measured the outcome in our sample if H0 is TRUE....
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