Question
In: Statistics and Probability
A. Suppose you want to study the number of hours of sleep full-time undergraduate students at...
A. Suppose you want to study the number of hours of sleep full-time undergraduate students at Belmont get each evening. To do so, you obtain a list of full-time undergraduate students at Belmont, obtain a simple random sample of ten students, and ask each of them to disclose how many hours of sleep they obtained the most recent Monday.
-
What is the population of interest in this study? What is the sample?
-
Explain why number of hours of sleep in this study is a random variable.
-
After you obtain your ten observations, you compute the mean number of hours of sleep. Is
this a statistic or a parameter? Why?
-
Is the mean number of hours computed in part (c) a random variable? Why? If it is a random
variable, what is the source of variation?
Solutions
orchestra answered 1 year agoRelated Solutions
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 0.86hours. We want to
construct a 95% confidence interval for the mean nightly hours of
sleep...
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 7.0 hours with a standard
deviation of 1.3 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 6.40 hours. Assume the
population standard deviation for college students is the same as
for all people....
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 35 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...
Students who get more sleep get better grades. You want to estimate the hours of sleep...
Students who get more sleep get better grades. You want to
estimate the hours of sleep per night that a college student gets.
You select 29 students; on average they slept 6.2 hours with a
standard deviation of 1.8 hours. The standard error is 0.334. In
order to be 90% confident of an estimate of the population mean,
what is the margin of error? (Enter the value with three decimal
places, using form #.###)
Sleep – College Students (Raw Data, Software Required): Suppose you perform a study about the hours...
Sleep – College Students (Raw Data, Software
Required):
Suppose you perform a study about the hours of sleep that college
students get. You know that for all people, the average is about
7.0 hours per night. You randomly select 35 college students and
survey them on the number of hours of sleep they get per night. The
data is found in the table below. You want to construct a 99%
confidence interval for the mean hours of sleep for all...
Suppose you want to study the effects of the number of students per classroom in algebra...
Suppose you want to study the effects of the number of students
per classroom in algebra courses and students’ performance in
algebra courses for high schools in Kansas. You collected a random
sample and now you have data for the above two variables. You
called them as number students (which refers to the number of
students per classroom in algebra courses), and students
performance (which refers to the students’ performance in algebra
courses - measured as their final grade in...
Suppose we conduct a study with 100 participants to estimate how many hours students sleep and...
Suppose we conduct a study with 100 participants to estimate how
many hours students sleep and find an average of 8 and a confidence
interval that ranges from 5 to 11. What is the margin of error?
Average Sleep Time on a School Night Students 4 hours 8 5 hours 9 6 hours...
Average Sleep Time on a School Night
Students
4 hours
8
5 hours
9
6 hours
14
7 hours
12
8 hours
15
9 hours
4
10 hours
0
Ho: 72.7% of high school students (grade 9-12) do not get enough
sleep at night. (minimum 8 hours) (article claim)
Ha: 72.7% of high school students (grade 9-12) do get enough
sleep at night.
Record the hypothesis test. Use 5% level of significance Include
95% confidence interval on solution sheet.
Create...
Average Sleep Time on a School Night Students 4 hours 8 5 hours 9 6 hours...
Average Sleep Time on a School Night
Students
4 hours
8
5 hours
9
6 hours
14
7 hours
12
8 hours
15
9 hours
4
10 hours
0
Ho: 72.7% of high school students (grade 9-12) do not get enough
sleep at night. (minimum 8 hours)
Ha: 72.7% of high school students (grade 9-12) do get enough
sleep at night.
Sample size:
Sample mean:
Sample deviation:
Record the hypothesis test. Use 5% level of significance Include
95% confidence interval...
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