Elementary Statistics
Elementary Statistics
3rd Edition
ISBN: 9781260373561
Author: Navidi, William
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 15.3, Problem 9E
To determine

To find: Whether the hypothesis H0 is rejected or not.

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Find the critical​ value α=0.04 a two-tailed test.
According to shopper data, 97% of households purchase toilet paper. An analyst believes this is too low. To investigate, the analyst selects a random sample of 500 households and finds that 98% of them purchase toilet paper. Do these data provide convincing statistical evidence at the α = 0.05 level to conclude that the true proportion of all households that purchase toilet paper differs from 0.97? Complete the “State” step for this test. H0: p =  Ha: p   where p = the true proportion of all  that .
What is the critical value for a two-tailed t test when α = 0.02 and d.f. = 18?

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