
Statistical Inference Unit Test
Authored by Joel Allen Basilia
Mathematics
9th - 12th Grade
Used 6+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a hypothesis test, the alternative hypothesis is always a statement of equality.
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A Type I error is when:
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A teacher in Math announced that the mean score of Grade 9 students in the first quarterly assessment in Mathematics was 89 and standard deviation was 6. One student, who believed that the mean score was less than this, randomly selected 30 students and computed the mean score. What kind of test of hypothesis can describe this?
Left-tailed
Two-tailed
Right-tailed
Multiple-tailed
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is the correct null and alternative hypotheses of the statement:
We want to test whether the general average of students in Math is different from 80%. .
H0: μ ≠ 80%, Ha: μ ≠ 80%
H0: μ = 80%, Ha: μ > 80%
H0: μ = 80%, Ha: μ ≠ 80%
H0: p = 80%, Ha: p ≠ 80%
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Suppose the P-value for a hypothesis test is 0.0304. Using a = 0.05, what is the appropriate conclusion?
a) Reject the null hypothesis
b) Reject the alternative hypothesis
c) Fail to reject the null hypothesis
d) Fail to reject the alternative hypothesis
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The average miles on a tank of gas for the Ford
Explorer is 300 miles with a standard deviation of 22
miles. A consumer group feels the average is actually
lower. They survey 40 vehicles and find the average
miles per tank is 290 miles. At α = 0.05, test the
consumer groups’ claim that the miles per tank is
actually lower than 300 miles.
There is enough evidence to reject the claim
There is not enough evidence to reject the claim
There is enough evidence to support the claim
There is not enough evidence to support the claim
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A cereal company claims the mean sodium content in
one serving of its cereal is no more than 230 mg. You
work for a national health service and are asked to test
this claim. You find that a random sample of 52
servings has a mean sodium content of 232 mg and a
standard deviation of 10 mg. At α = 0.05, do you have
enough evidence to reject the company’s claim?
Reject Ho
Reject Ha
Fail to reject Ho
Fail to reject Ha
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