Many shoppers have expressed dissatisfaction because grocery stores have stopped putting prices on individual items. A study gives the following summary table. Age < 30 30-39 40-49 50 - 59 141 82 63 23 5 3 Need Item Yes 65 Pricing No 60 60 49 9 (a) Does the need for item pricing appear to be independent of age? Carry out a test at a = 0.01. (b) Is the sample size large enough for the inference in part (a) to be valid? (c) Is it necessary to further describe the relationship between the need for item pricing and age? Explain briefly. If yes, further describe the relationship by providing an appropriate plot.

Many shoppers have expressed dissatisfaction because grocery stores have stopped putting prices on individual items. A study gives the following summary table. Age < 30 30-39 40-49 50 - 59 141 82 63 23 5 3 Need Item Yes 65 Pricing No 60 60 49 9 (a) Does the need for item pricing appear to be independent of age? Carry out a test at a = 0.01. (b) Is the sample size large enough for the inference in part (a) to be valid? (c) Is it necessary to further describe the relationship between the need for item pricing and age? Explain briefly. If yes, further describe the relationship by providing an appropriate plot.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 30PPS

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