(1) A random sample of 20 taste-testers rate the quality of a proposed new product on...

Question

Question

(1) A random sample of 20 taste-testers rate the quality of a proposed new product on a 0-100 scale. The ordered scores are

	Ratings	(a) Calculate a 95% confidence interval for the population mean score.
	16
	20
	31
	50
	50
	50
	51
	53
	53	(b) Recalculate the confidence interval but with a 90% confidence level for the same population mean.
	55
	57
	59
	60
	60
	61
	65
	67	(c) Which is wider, the 90% interval or the 95% interval?
	67
	81
	92

Answer 1

Answer #1

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Answer 2

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