Question

USE MINITAB

In a random sample of 600 cars making a right turn

at a certain intersection, 157 pulled into the wrong

lane. Test the null hypothesis that actually 30% of all

drivers make this mistake at the given intersection,

using the alternative hypothesis p = 0.30 and the level

of signiﬁcance

(a) α = 0.05; B.form a 95% confidence interval that can be used to estimate the true proportion

Answer #1

The mean family income for a random sample of 600 suburban
households in Loganville shows that a 95 percent confidence
interval is ($43,100, $59,710). Alma is conducting a test of the
null hypothesis H0: µ = 42,000 against the alternative hypothesis
Ha: µ ≠ 42,000 at the α = 0.05 level of significance. Does Alma
have enough information to conduct a test of the null hypothesis
against the alternative?
A No, because the value of σ is not known
B...

Certain states require your vehicle to be inspected for safety
on a yearly basis. Police randomly stop drivers from time to time
to ensure that the car's safety inspection is up to date. Last
year, an average of 10% of cars stopped were ticketed for having
expired stickers. The state then funded a marketing campaign to
increase awareness of the safety inspection requirement in hopes of
lowering the amount of tickets issued. Last month the police issued
tickets for expired...

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