AP Statistics Intro to Hypothesis Testing

Quiz
•
Mathematics
•
10th - 12th Grade
•
Hard
Barbara White
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Failing to reject a null hypothesis when you should have is called:
a Type I error
a Type II error
both a Type I and Type II error
no error
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A Type I error is when:
We reject the null hypothesis when we should not have
We reject the null hypothesis when we should have accepted it
We fail to reject the null hypothesis when it's actually false
We reject the alternate hypothesis when it's actually true
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A car manufacturer advertises that its new subcompact models get 47 mpg. If μ is the mileage of these cars, what could be the null and alternate hypothesis if we suspect that the advertised mpg is an over estimate of the truth?
H0: µ = 47
Ha: µ = 47
H0: µ = 47
Ha: µ < 47
H0: µ = 47
Ha: µ > 47
H0: µ = 47
Ha: µ ≠ 47
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A mayor is concerned about the percentage of city residents who express disapproval of his job performance. His political committee pays for a newspaper ad, hoping to keep his disapproval rating below 21%. They will use a follow up poll to access effectiveness. What are the correct null and alternative hypotheses?
H0: μ=21
Ha: μ<21
H0: p=.20
Ha: p<.20
H0: p< .21
Ha: p= .21
H0: p= .21
Ha: p< .21
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A P-value indicates:
the probability that the null hypothesis is true
the probability that the alternative hypothesis is true
the probability of obtaining a result as extreme or more extreme than the one we obtained
probability of a Type I error
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A hypothesis test tests the null hypothesis H0: μ = 20 against the alternative hypothesis Ha: μ ≠ 20 at a significance level of alpha. If the same procedure is used to test H0: μ = 20 against Ha: μ > 20 with the same data then the p-value will
increase
decrease
remain the same
be doubled
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How do you calculate the degrees of freedom for a t-procedure?
It is equal to the p-value.
It is equal to 1 – (p-value).
It is equal to the significance level.
It is equal to n-1
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