Question
According to a report, the standard deviation of monthly cell phone bills was $49.95 three years...
According to a report, the standard deviation of monthly cell phone bills was $49.95 three years ago. A researcher suspects that the standard deviation of monthly cell phone bills is less today.
(a) Determine the null and alternative hypotheses.
(b) Explain what it would mean to make a Type I error.
(c) Explain what it would mean to make a Type II error
Homework Answers
Answer #1
(A) it is given that the researcher suspects that the standard deviation of monthly cell phone bills is less today. So, it is a left tailed hypothesis test
(B) Type I error is the rejection of a true null hypothesis
In this case, type I error would be the conclusion that the standard deviation of monthly cell phone bills is less than $49.95, when in fact, it is not less than $49.95.
(C)
Type II error is the failure to reject a false null hypothesis
In this case, type II error would be the conclusion that the standard deviation of monthly cell phone bills is $49.95, when in fact, it is less than $49.95.
Not the answer you're looking for?
Similar Questions
According to a report, the standard deviation of monthly cell phone bills was $49.51 three years...
According to a report, the standard deviation of monthly cell
phone bills was $49.51 three years ago. A researcher suspects that
the standard deviation of monthly cell phone bills is less today.
(a) Determine the null and alternative hypotheses. (b) Explain
what it would mean to make a Type I error. (c) Explain what it
would mean to make a Type II error.
According to a report, the standard deviation of monthly cell phone bills was $49.42 three years...
According to a report, the standard deviation of monthly cell
phone bills was $49.42 three years ago. A researcher suspects that
the standard deviation of monthly cell phone bill is less today.
(a) Determine the null and alternative hypotheses (b) Explain what
it would mean to make a type I error (c) Explain what it would mean
to make a type II error?
According to a report, the mean of monthly cell phone bills was $49.85 three years ago....
According to a report, the mean of monthly cell phone bills was
$49.85 three years ago. A researcher suspects that the mean of
monthly cell phone bills is less today. (a) Determine the null and
alternative hypotheses. (b) Explain what it would mean to make a
Type I error. (c) Explain what it would mean to make a Type II
error. (a) State the hypotheses. Upper H 0: mu equals $ 49.85
49.85 Upper H 1: mu greater than $...
According to a report, the standardstandard deviation ofdeviation of monthly cell phone billbills was $48.4248.42 three...
According to a report, the
standardstandard
deviation ofdeviation of
monthly cell phone
billbills
was
$48.4248.42
three years ago. A researcher suspects that the
standardstandard
deviation ofdeviation of
monthly cell phone
billbills
is
higherhigher
today.
(a)
Determine the null and alternative hypotheses.
(b)
Explain what it would mean to make a Type I error.
(c)
Explain what it would mean to make a Type II error.
(a) State the hypotheses.
Upper H 0H0:
▼
muμ
sigmaσ
pp
▼
equals=
greater than>...
According to a report by Scarborough Research, the average monthly household cellular phone bill is $73....
According to a report by Scarborough
Research, the average monthly household cellular phone bill is $73.
Suppose local monthly household cell phone bills are normally
distributed with a standard deviation of $22.
What is the probability that a randomly selected monthly cell
phone bill is less than $95?
What is the probability that a randomly selected monthly cell
phone bill is between $62 and $84?
According to a report by Scarborough
Research, the average monthly household cellular phone bill is...
The standard deviation in the pressure required to open a certain valve is known to be...
The standard deviation in the pressure required to open a
certain valve is known to be sigma equals 1.4 psi. Due to changes
in the manufacturing process, the quality-control manager feels
that the pressure variability has increased.
(a) Determine the null and alternative hypotheses.
(b) Explain what it would mean to make a Type I error.
(c) Explain what it would mean to make a Type II error.
3.) The standard deviation in the pressure required to open a certain valve is known to...
3.) The standard deviation in the pressure required to open a
certain valve is known to be sigma equals 0.8 psi. Due to changes
in the manufacturing process, the quality-control manager feels
that the pressure variability has increased . (a) Determine the
null and alternative hypotheses. (b) Explain what it would mean to
make a Type I error. (c) Explain what it would mean to make a Type
II error.
Three years ago, the mean price of an existing single-family home was $243,759 A real estate...
Three years ago, the mean price of an existing single-family
home was
$243,759
A real estate broker believes that existing home prices in her
neighborhood are
lowerlower.
(a)
Determine the null and alternative hypotheses.
(b)
Explain what it would mean to make a Type I error.
(c)
Explain what it would mean to make a Type II error.
Three years ago, the mean price of an existing single-family home was $243,774 A real estate...
Three years ago, the mean price of an existing single-family
home was
$243,774
A real estate broker believes that existing home prices in her
neighborhood are
higherhigher.
(a)
Determine the null and alternative hypotheses.
(b)
Explain what it would mean to make a Type I error.
(c)
Explain what it would mean to make a Type II error.
Three years ago, the mean price of an existing single-family home was $243,708. A real estate...
Three years ago, the mean price of an existing single-family
home was
$243,708.
A real estate broker believes that existing home prices in her
neighborhood are
higherhigher.
(a)
Determine the null and alternative hypotheses.
(b)
Explain what it would mean to make a Type I error.
(c)
Explain what it would mean to make a Type II error.
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 4 minutes ago
asked 32 minutes ago
asked 40 minutes ago
asked 47 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 2 hours ago
asked 2 hours ago
asked 2 hours ago
asked 2 hours ago