During the 2009 holiday season, 436 randomly sampled American adults were surveyed regarding their average spending on Black Friday. A 95% confidence interval based on this sample is ($80.31,$89.11). (a) What is the margin of error of the interval? (b) A local news anchor claimed that the average spending was $100. Has this claim statistical evidence or not? Explain. (c) Determine the sample mean x and the sample standard deviation s of the sample.
During the 2009 holiday season, 436 randomly sampled American adults were surveyed regarding their average spending on Black Friday. A 95% confidence interval based on this sample is ($80.31,$89.11). (a) What is the margin of error of the interval? (b) A local news anchor claimed that the average spending was $100. Has this claim statistical evidence or not? Explain. (c) Determine the sample mean x and the sample standard deviation s of the sample.
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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During the 2009 holiday season, 436 randomly sampled American adults were surveyed regarding their average spending on Black Friday. A 95% confidence interval based on this sample is ($80.31,$89.11).
(a) What is the margin of error of the interval?
(b) A local news anchor claimed that the average spending was $100. Has this claim statistical evidence or not? Explain.
(c) Determine the sample
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