Question

FOR NEXT 5 QUESTIONS USE THE FOLLOWING DIRECTION:

A local group claims that more than a quarter of traffic violation tickets that the police issues in their locality (Milltown) is speeding ticket. To prove their point, they randomly select two weeks and got record of all traffic violation tickets issued by police during those two weeks. Their research yields that 84 out of 210 tickets were speeding tickets.

Which method the agency can use to check the researchers claim?

a. Hypothesis testing - Z test for mean

b. Hypothesis testing - Z test for proportion

c. Hypothesis testing - t test for mean

d. Hypothesis testing - t test for proportin

Answer 1

Answer :

b. Hypothesis testing - Z test for proportion

becauese,

Claim :more than a quarter of traffic violation tickets that the police issues in their locality (Milltown) is speeding ticket.

let, x : speeding tickets

n = sample size = 210

x = 84

here, we can use one sample proportion test for thesting, In that we use Z-test for sample proportion.

with    which is sample proportion.