the researcher wants to determine if more than 50% of the packs of junk food contains sodium of at least 70mg. 12 packs were randomly selected. based on the samples, 10 packs contain sodium of at least 70mg while 2 contain of less than 70mg. is z-test can be used as an alternative to binomial exact test since nPo & n(1-Po) are sufficiently large (both at least 5)?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.8: Probability
Problem 31E
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the researcher wants to determine if more than 50% of the packs of junk food contains sodium of at least 70mg. 12 packs were randomly selected. based on the samples, 10 packs contain sodium of at least 70mg while 2 contain of less than 70mg. is z-test can be used as an alternative to binomial exact test since nPo & n(1-Po) are sufficiently large (both at least 5)?
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