A local group claims that the police issue more than 60 speeding tickets per day in...

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A local group claims that the police issue more than 60 speeding tickets per day in their area. To prove their point, they ra

math Statistics-And-Probability

Answer 1

Answer #1

Below are the null and alternative Hypothesis,
Null Hypothesis, H0: μ = 60
Alternative Hypothesis, Ha: μ > 60

Rejection Region
This is right tailed test, for α = 0.02 and df = 13
Critical value of t is 2.282.
Hence reject H0 if t > 2.282

Test statistic,
t = (xbar - mu)/(s/sqrt(n))
t = (63.0714 - 60)/(9.3353/sqrt(14))
t = 1.231

P-value Approach
P-value = 0.1201
As P-value >= 0.02, fail to reject null hypothesis.

Answer 2

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