Question
6. (4 pts) The average number of hours of sleep that US college students get is...
6.
(4 pts) The average number of hours of sleep that US college
students get is known to be Normally distributed, with μ = 7.02
hours and σ = 1.15 hours. (6.1) What proportion of students get
less than 5 hours of sleep per night on the average? (1 pt) (6.2)
Sam gets an average of 8.3 hours of sleep. What is Sam’s percentile
score (z-statistics)? (2 pts) What is Sam’s percentile raking (the
percentage of students whose hours of sleep are less than or equal
to Sam’s)? (1 pt) （calculate step by step ）
Homework Answers
Answer #1
Not the answer you're looking for?
Similar Questions
. The average college student gets 8 hours of sleep a night. Health services wants to...
. The average college student gets 8 hours of sleep a night.
Health services wants to know if UNH students get more or less
sleep than the average student. They sample 46 students and find
that they sleep on average 7 hours a night with a standard
deviation of 1.86.
a.
State the null and alternative hypothesis.
b.
Conduct the most appropriate test.
c.
What do you conclude?
d.
If applicable, what is the 95% confidence interval?
Sleep – College Students: Suppose you perform a study about the hours of sleep that college...
Sleep – College Students: Suppose you perform a
study about the hours of sleep that college students get. You know
that for all people, the average is about 7 hours. You randomly
select 40 college students and survey them on their sleep habits.
From this sample, the mean number of hours of sleep is found to be
6.1 hours with a standard deviation of 0.97 hours. You want to
construct a 99% confidence interval for the mean nightly hours of...
Sleep – College Students: Suppose you perform a study about the hours of sleep that college...
Sleep – College Students: Suppose you perform a study about
the hours of sleep that college students get. You know that for all
people, the average is about 7 hours. You randomly select 45
college students and survey them on their sleep habits. From this
sample, the mean number of hours of sleep is found to be 6.1 hours
with a standard deviation of 0.86 hours. You want to construct a
99% confidence interval for the mean nightly hours of...
Sleep – College Students: Suppose you perform a study about the hours of sleep that college...
Sleep – College Students: Suppose you perform a
study about the hours of sleep that college students get. You know
that for all people, the average is about 7 hours. You randomly
select 45 college students and survey them on their sleep habits.
From this sample, the mean number of hours of sleep is found to be
6.1 hours with a standard deviation of 0.97 hours. You want to
construct a 99% confidence interval for the mean nightly hours of...
In this discussion, we are going to consider 5 studies on the amount of sleep college...
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...
Sleep – College Students: Suppose you perform a study about the hours of sleep that college...
Sleep – College Students: Suppose you perform a
study about the hours of sleep that college students get. You know
that for all people, the average is about 7 hours. You randomly
select 50 college students and survey them on their sleep habits.
From this sample, the mean number of hours of sleep is found to be
6.2 hours with a standard deviation of 0.97 hours. We want to
construct a 95% confidence interval for the mean nightly hours of...
Sleep – College Students: Suppose you perform a study about the hours of sleep that college...
Sleep – College Students: Suppose you perform a study about
the hours of sleep that college students get. You know that for all
people, the average is about 7 hours. You randomly select 45
college students and survey them on their sleep habits. From this
sample, the mean number of hours of sleep is found to be 6.2 hours
with a standard deviation of 0.97 hours. We want to construct a 95%
confidence interval for the mean nightly hours of...
Sleep – College Students: Suppose you perform a study about the hours of sleep that college...
Sleep
– College Students: Suppose you perform a study about the hours of
sleep that college students get. You know that for all people, the
average is about 7 hours. You randomly select 45 college students
and survey them on their sleep habits. From this sample, the mean
number of hours of sleep is found to be 6.2 hours with a standard
deviation of 0.97 hours. We want to construct a 95% confidence
interval for the mean nightly hours of...
Sleep – College Students: Suppose you perform a study about the hours of sleep that college...
Sleep – College Students: Suppose you perform a
study about the hours of sleep that college students get. You know
that for all people, the average is about 7 hours. You randomly
select 40 college students and survey them on their sleep habits.
From this sample, the mean number of hours of sleep is found to be
6.2 hours with a standard deviation of 0.86 hours. We want to
construct a 99% confidence interval for the mean nightly hours of...
Suppose college students average 7.3 hours of sleep per night with a standard deviation of 45...
Suppose college students average 7.3 hours of sleep per night
with a standard deviation of 45 minutes, and suppose that this is
normally-distributed.
What is the probability that a randomly-selected college student
sleeps for more than 8.1 hours?
Probability =
What is the 60th percentile for college-student sleep times?
Round your answer to four decimal places.
60th percentile = hours
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 9 minutes ago
asked 19 minutes ago
asked 24 minutes ago
asked 36 minutes ago
asked 36 minutes ago
asked 37 minutes ago
asked 51 minutes ago
asked 58 minutes ago
asked 59 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago