156.
The hypothesis statement
H
:
μ
< 60 is an example of an alternative hypothesis.
157.
YouTube would like to test the hypothesis that the average length of

an online video watched by a user is more than 8 minutes. A random sample of 37
people watched online videos that averaged 8.7 minutes in length. It is believed that

the population standard deviation for the length of online videos is 2.5
minutes. YouTube would like to set
α
= 0.02. The correct hypothesis statement for this
hypothesis test would be _____.

158.
Reducing
?
without increasing the sample size will cause
?
to increase.

159.
A professor would like to test the hypothesis that the average number of minutes
that a student needs to complete a statistics exam is equal to 45 minutes. A Type I
error would occur if the professor concludes that the average exam time is

160.
The probability of a Type II error is denoted as _______.
161.
YouTube would like to test the hypothesis that the average length of an online

video watched by a user is more than 8 minutes. A random sample of 37 people
watched online videos that averaged 8.7 minutes in length. It is believed that the
population standard deviation for the length of online videos is 2.5 minutes. YouTube
would like to set
α
= 0.02. The critical value for this hypothesis test would be ________.
162.
The null hypothesis is also known as the research hypothesis because it represents

the position the researcher wants to establish.
163.
The
?
calculation is made under the premise that the null hypothesis is true and

should rightfully be accepted.
164.
If you are a researcher and the purpose of the hypothesis test is to prove that your

findings are an improvement over the status quo, the condition that you are
attempting to prove is assigned to the null hypothesis.

165.
The power curve plots the power values of a hypothesis test over a range of
corresponding sample means.

166.
When testing for the population mean when sigma is known and a sample size is
greater than 30, the population must be normally distributed in order for the
conclusions to be reliable.
167.
The only way to reduce both
?
and
?
simultaneously in a hypothesis test is to

increase the sample size.
168.
The hypothesis statement is an example of a one-tail hypothesis test.

169.
A Type II error occurs in hypothesis testing when we _____.

170.
A Type II error is known as the producer's risk because, when it occurs in quality
control settings, the producer is looking for a problem in its process that does not
exist.