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Question 8 According to a Pew Research Center study, in May 2011, 39% of all American Type numbers in the boxes, adults had a
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Answer #1

Solution :

This is the right tailed test .

The null and alternative hypothesis is

H0 : p =0.39

Ha : p >   0.39

n = 449

x = 206

\hat p = x / n =206 / 449 =0.46

P0 = 0.39

1 - P0 = 1 - 0.39 = 0.61

Test statistic = z

= \hat p - P0 / [\sqrtP0 * (1 - P0 ) / n]

= 0.46 - 0.39/ [\sqrt0.39 * 0.61 / 449]

= 2.989

Test statistic = z = 2.99

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