Question: Question 4 A sample of 20 observations shows a sample mean of 290 and a sample standard Not yet deviation of 30. answered Marked out

Question 4 A sample of 20 observations shows a sample mean of 290 and a sample standard Not yet deviation of 30. answered Marked out of 1.00 Provide a 90 per cent confidence interval estimate of the population variance. Flag question Select one: a. 657 so2 s 1890 b. 567 so2 s 1690 O c. 657 so2 s 1790 O d. 567 so2 s 1790

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