Question 33 of 36 (1 point) View problem in a pop-up Stock prices: The Standard

Question

Question 33 of 36 (1 point) View problem in a pop-up Stock prices: The Standard and Poor's (S&P;) 500 is a group of 500 large companies traded on the New York Stock Exchange. Following are prices, in dellars, for one day for a random sample of ten stecks. 8.11 74.23 35.25 13.19 53.55 84.25 201.94 Download data Assume the population standard deviation is -46. Part 1 out of 3 Explain why it is necessary to check whether the population is approximately normal before constructing a confidence interval. It is necessary to check whether the population is approximately normal because (select) Ti (select) the sample size is less than or equal to 30 the sample standard deviation is not known the population mean is not known the population standard deviation is not known arch t0 144

Explanation / Answer

from central limit theorum for sample mean to be normally distributed ; sample size should be greater than 30

therfore correct option is sample size is less than or equal to 30.

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