Question

Asked Dec 1, 2019

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Need answer to question 17.

Step 1

Given information,

Level of significance =0.01.

In a sample of 5000 it is found that 1805 had cell phones, then sample proportion is,

Step 2

(16)

And also given, a marketing manager for a cell phone company claims that more than 35% of children age 10 have cell phones.

Now,

__Null and alternative hypothesis:__

Step 3

(17)

Now, test statistic for sample proportion.

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