Question

A "sleep habits" survey answered by 23 randomly selected New
Yorkers contained the question "How much sleep do you get per
night?" The sample average was 7.72 hours, with a corresponding
sample standard deviation of 0.8 hours. Conduct a hypothesis test
to see if there is evidence that New Yorkers (who live, after all,
in "the city that never sleeps") on average get less than 8 hours
of sleep per night, using *α*=0.05.

a. The t test statistic is:

Round your answer to 3 decimal places

b. What is probability that we would obtain a test statistic at
least this extreme if the population mean sleep time for New
Yorkers was *not* less than 8 hours per night?

Hint: the phrasing of this question is based on the definition of a
particular statistic. Round your answer to 3 decimal places

c. Using a level of significance of 0.05, the data: provides
statistically significant OR does not provide statistically
significant evidence to suggest that New Yorkers on average get
less than 8 hours of sleep per night.

Answer #1

thank you

A "sleep habits" survey answered by 23 randomly selected New
Yorkers contained the question "How much sleep do you get per
night?" The sample average was 7.75 hours, with a corresponding
sample standard deviation of 0.8 hours. Conduct a hypothesis test
to see if there is evidence that New Yorkers (who live, after all,
in "the city that never sleeps") on average get less than 8 hours
of sleep per night, using α=0.05.
a. The t test statistic is:
Round...

A "sleep habits" survey answered by 48 randomly selected New
Yorkers contained the question "How much sleep do you get per
night?" The sample average was 7.85 hours, with a corresponding
sample standard deviation of 0.82 hours. We want to test against
the null hypothesis that New Yorkers get, on average, 8 hours of
sleep per night. α=0.05.
b. The t test statistic is: _______ (Round your answer to 3 decimal
places)
c. The approximate 95% CI is: ______ to...

Sleep habits of New
Yorkers.
New York is known as the city that never sleeps. A random sample
of 9
New Yorkers were asked how much sleep they get per night.
Statistical summaries of these data are shown below. Do these data
provide strong evidence that New Yorkers sleep less than 8 hours a
night on average? (Use significance value
α=0.03.)
N
x¯
s
9 7.83 0.8
H0:μ
HA:μ
p-value:
Based on this information, we may Accept/Reject
Find...

New York is known as "the city that never sleeps." Twenty-five
(n=25) New Yorkers were randomly sampled and asked how much sleep
they get per night and the sample mean was 7.3 hours. To test if
New Yorkers sleep less than 8 hours a night on average (H0: μ = 8
v.s. Ha: μ < 8, where μ is the mean number of hours New Yorkers
sleep a night), the P-value is
a) the probability of getting a random sample...

Assume the gen. population gets an average of 7 hours of sleep
per night. You randomly select 55 college students and survey them
on their sleep habits. From this sample, the mean number of hours
of sleep is found to be 6.83 hours with a standard deviation of
0.55 hours. You claim that college students get less sleep than the
general population. That is, you claim the mean number of hours of
sleep for all college students is less than...

The author obtained times of sleep for randomly selected adult
subjects included in the National Health and Nutrition Examination
Study, and those times (hours) are listed below.
4, 7, 4, 4, 8, 6, 8, 7, 7, 6, 7, 6.
A common recommendation is that adults should sleep between 7
hours and 9 hours each night. Use 0.05 significance level to test
the claim that the mean amount of sleep for adults is less than 7
hours.
Reject . There is...

In this discussion, we are going to consider 5 studies on the
amount of sleep college students get in a typical night. It is long
been recommended that adults should get 8 hours of sleep each
night. Five scientists each take a random sample of n
students to help them learn about the true average number of hours
sleep college students get in a typical night (so each scientist
has the same number of students, but different individuals, in
their...

The author obtained times of sleep for randomly selected adult
subjects included in the National Health and Nutrition Examination
Study, and those times (hours) are listed below. 4, 7, 4, 4, 8, 6,
8, 7, 7, 6, 7, 6. A common recommendation is that adults should
sleep between 7 hours and 9 hours each night. Use 0.05 significance
level to test the claim that the mean amount of sleep for adults is
less than 7 hours.
Do not reject H...

A new survey of more
than 440,000 Americans finds that about a third of adults don’t get
enough sleep. About 65% of Americans get a “healthy” amount of
sleep, or at least 7 hours a night, while 35% get less than 7 hours
of sleep per night, according to the survey. I polled 10 friends
and family about the number of hours of sleep they get a night,
4,7,8,3,6,6,5,7,6,6. Is mean value of the random sample less than
the recommended...

A survey was conducted to determine whether hours of sleep per
night are independent of age. A sample of individuals was asked to
indicate the number of hours of sleep per night with categorical
options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8
hours or more. Later in the survey, the individuals were asked to
indicate their age with categorical options: age 39 or younger and
age 40 or older. Sample data follow.
Hours...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 4 minutes ago

asked 8 minutes ago

asked 10 minutes ago

asked 10 minutes ago

asked 17 minutes ago

asked 17 minutes ago

asked 17 minutes ago

asked 20 minutes ago

asked 27 minutes ago

asked 30 minutes ago

asked 30 minutes ago

asked 37 minutes ago