Business, 06.08.2019 19:30 ayoismeisalex
Asimple random sample of size n is drawn from a population that is known to be normally distributed. the sample variance, s squareds2, is determined to be 11.611.6. complete parts (a) through (c). (a) construct a 90% confidence interval for sigma squaredΟ2 if the sample size, n, is 20. the lower bound is 7.317.31. (round to two decimal places as needed.) the upper bound is 21.7921.79. (round to two decimal places as needed.) (b) construct a 90% confidence interval for sigma squaredΟ2 if the sample size, n, is 30. the lower bound is 7.907.90. (round to two decimal places as needed.) the upper bound is 1919. (round to two decimal places as needed.) how does increasing the sample size affect the width of the interval? the width does not change the width increases the width decreases
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Asimple random sample of size n is drawn from a population that is known to be normally distributed....
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