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Part (b) O Part (c) O Part (d) Construct a 95% confidence interval for the population average worth of coupons. ) State the confidence interval. (Round your answers to two decimal places.) e. (i1) Sketch the graph. C.L. =

Part (b) O Part (c) O Part (d) Construct a 95% confidence interval for the population average worth of coupons. ) State the confidence interval. (Round your answers to two decimal places.) e. (i1) Sketch the graph. C.L. =

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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A survey of the average amount of cents off that coupons give was done by randomly surveying one coupon per page from the coupon sections of a recent San Jose Mercury News. The following data were collected: 25%; 75%; 55%; 65%; 30%; 55%; 40%; 40g; 30%; 556; $1.50; 40%; 65%; 40%. Assume the underlying distribution is approximately normal. NOTE: If you are using a Student's t-distribution, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) O Part (a) () x= (rounded to two decimal places) (ii) s, = c (rounded to two decimal places) (iii) n = (iv) n-1 = + Part (b) O Part (c) O Part (d) Construct a 95% confidence interval for the population average worth of coupons. (i) State the confidence interval. (Round your answers to two decimal places.) (ii) Sketch the graph. C.L. = (i) Calculate the error bound. (Round your answer to two decimal places.)
Transcribed Image Text:A survey of the average amount of cents off that coupons give was done by randomly surveying one coupon per page from the coupon sections of a recent San Jose Mercury News. The following data were collected: 25%; 75%; 55%; 65%; 30%; 55%; 40%; 40g; 30%; 556; $1.50; 40%; 65%; 40%. Assume the underlying distribution is approximately normal. NOTE: If you are using a Student's t-distribution, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) O Part (a) () x= (rounded to two decimal places) (ii) s, = c (rounded to two decimal places) (iii) n = (iv) n-1 = + Part (b) O Part (c) O Part (d) Construct a 95% confidence interval for the population average worth of coupons. (i) State the confidence interval. (Round your answers to two decimal places.) (ii) Sketch the graph. C.L. = (i) Calculate the error bound. (Round your answer to two decimal places.)
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