Screenshot 2019-11-01 at 13.39.18.png - Question 3 In the following find the indicated confidence interval where the indicated standard error comes from

Screenshot 2019-11-01 at 13.39.18.png - Question 3 In the...

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Unformatted text preview: Question 3 In the following, find the indicated confidence interval where the indicated standard error comes from a bootstrap distribution that is approximately Correct normally distributed. 6.00 points out of 6.00 Flag 1. A 95% confidence interval for a proportion p if the sample has n = 100 with p = 0.43 and the standard error is SE = 0.05 is 0.33 question to 0.53 2. A 90% confidence interval for a mean / if the sample has n = 30 with x = 23.1 and s = 5.7 and the standard error is SE = 1.04 is 21.39 24.81 3. A 99% confidence interval for a proportion p is the sample has n = 200 with p = 0.78 and the standard error is SE = 0.03 is 0.7 to 0.86 Question 4 Find the value of the standardized z-test statistic in each situation below: Correct 3.00 points out 1. Test Ho : M = 80 vs Ha : M > 80 when the sample has n = 20, x = 82.4, and s = 3.5 with SE = 0.8. z = 3 of 3.00 Flag 2. Test Ho : p = 0.25 vs Ha : P < 0.25 when the sample has n = 800, p = 0.235 with SE = 0.018. z = -0.83 question 3. Test Ho : M1 = M2 VS Ha : M1 > M2 when the sample has nj = n2 = 50, x1 = 35.4, x2 = 34.1. The standard error of X1 - X2 is SE = 0.25. z = 5.2 Question 5 Use pnorm() or xpnorm() to find the p-value based on a standard normal distribution for each of the following standardized test statistics: Correct 5.00 points out 1. z = 0.84 for an upper tail test p= 0.2 of 5.00 Flag 2. z = 2.25 for a two-tailed test p= 0.024 question 3. z = -2.38 for a lower tail test p= 0.0087 4. z = 4.12 for an upper tail test p= 1.9E-5 5. z = -1.58 for a two-tailed test p= 0.11...
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