HW Score: 87.96% (13.19 of 1 5 pts) A simple random sample of size n is drawn. T
ID: 3155693 • Letter: H
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HW Score: 87.96% (13.19 of 1 5 pts) A simple random sample of size n is drawn. The sample mean, x, is found to be 17.8, and the sample standard deviation, s, is found to be 4.7 DClick the icon to view the table of areas under the t-distribution. (a) Construct a 95% confidence interval about if the sample size, n, is 34. Lower bound: 16.16 ; Upper bound: 1944 (Use ascending order. Round to two decimal places as needed) (b) Construct a 95% confidence interval about if the sample size, n, is 51. Lower bound: '16.48; Upper bound: 1912 (Use ascending order. Round to two decimal places as needed.) How does increasing the sample size affeet the margin of error, E? A The margin of error increases. The margin of error decreases. OC. The margin of error does not change. (c) Construct a 99% confidence interval about if the sample size, n, is 34. Lower bound 15.60; Upper bound: 20.00 (Use ascending order. Round to two decimal places as needed.) Compare the results to those obtained in part (a). How does increasing the level of confidence affect the size of the margin of error, E? MA. The margin of error increases. OB. The margin of error does not change. C The margin of error decreases (d) If the sample size is 18, what conditions must be satisfied to compute the confidence interval? Click to select your answer, then click Check Answer CheckExplanation / Answer
I check all your answer and are correct , confidence interval and margin of error
the only answer that you dont nothing is d)
answer of d )
the same must come from a population that is normally distributed and the sample size must be large
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