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1. A student wonders if people from small towns are friendlier than the general population. To...

1.

A student wonders if people from small towns are friendlier than the general population. To test this hypothesis he gives 100 people a friendliness survey. The population mean for this survey is 50 with a standard deviation of 12. The mean for his sample is 52.5. Compute a z for a sample mean to determine if his hypothesis was supported. Use α = .05, one-tailed. What are the one-tailed null and research hypotheses for this study?

a.

H0: µ = 50, H1: µ ≠ 50
b.

H0: µ < 50, H1: µ ≥ 50
c.

H0: µ ≤ 50, H1: µ > 50
d.

H0: µ = 50, H1: µ >50
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Answer #1

Given that, population mean = 50 and population standard deviation = 12

sample size = 100 and sample mean = 52.5

The one-tailed null and research hypotheses for this study are,

H0 : μ = 50

H1 : μ > 50

Answer : d)

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