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7. Last year, 800 American families in Penns ylvania were randomly selected and interviewed concerning the amount of money they spent last year on home heating oil. The sample results indicated that the amount spent by the 800 families had a mean of $3,600 and a standard deviation of $600. What is the point estimate of the true population mean? How accurate is this point estimate (with 90% certainty)? In other words, calculate b. the 90% margin of crror a. c. Calculate a 90% confidence interval estimate of u

7. Last year, 800 American families in Penns ylvania were randomly selected and interviewed concerning the amount of money they spent last year on home heating oil. The sample results indicated that the amount spent by the 800 families had a mean of $3,600 and a standard deviation of $600. What is the point estimate of the true population mean? How accurate is this point estimate (with 90% certainty)? In other words, calculate b. the 90% margin of crror a. c. Calculate a 90% confidence interval estimate of u

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 7PPS
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7. Last year, 800 American families in Penns ylvania were randomly selected and interviewed concerning the amount of money they spent last year on home heating oil. The sample results indicated that the amount spent by the 800 families had a mean of $3,600 and a standard deviation of $600. What is the point estimate of the true population mean? How accurate is this point estimate (with 90% certainty)? In other words, calculate b. the 90% margin of crror a. c. Calculate a 90% confidence interval estimate of u
Transcribed Image Text:7. Last year, 800 American families in Penns ylvania were randomly selected and interviewed concerning the amount of money they spent last year on home heating oil. The sample results indicated that the amount spent by the 800 families had a mean of $3,600 and a standard deviation of $600. What is the point estimate of the true population mean? How accurate is this point estimate (with 90% certainty)? In other words, calculate b. the 90% margin of crror a. c. Calculate a 90% confidence interval estimate of u
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