Question
In: Math
7. a) A study measures how the number of hours of sleep a person gets affects...
7. a) A study measures how the number of hours of sleep a person gets affects the number of errors they make in a test of short term memory. The regression finds the slope (b) = -3 and the intercept (a) = 25. Interpret the slope in a sentence. Interpret the intercept in a sentence.
b) A study measures how a person’s age (in years) affects the number of messages they get on a dating site. The regression finds the slope (b) = -2 and the intercept (a) = 100. Interpret the slope in a sentence. Interpret the intercept in a sentence.
c) For which of the two studies mentioned above is it more reasonable to interpret the intercept and why?
Solutions
milcah answered 6 months agoRelated Solutions
Sleep: Assume the general population gets an average of 7 hours of sleep per night. You...
Sleep: Assume the general population gets an
average of 7 hours of sleep per night. 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 6.89 hours
with a standard deviation of 0.25 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...
Sleep (Raw Data, Software Required): Assume the general population gets an average of 7 hours of...
Sleep (Raw Data, Software Required):
Assume the general population gets an average of 7 hours of sleep
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 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 7
hours. Test...
Sleep (Raw Data, Software Required): Assume the general population gets an average of 7 hours of...
Sleep (Raw Data, Software Required): Assume the general
population gets an average of 7 hours of sleep 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 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 7 hours. Test...
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...
Another person found that the hours of sleep for female students is normally distributed with a...
Another person found that the hours of sleep for female students
is normally distributed with a mean of 8.34 hours and a standard
deviation of 10.24 minutes.
(1 mark) What is the probability that a randomly selected female
student at the college sleep less than 8.47 hours? (4dp) Answer
What is the probability that a randomly selected
female student at the college sleep more than 8.31 hours? (4dp)
Answer
What is the probability that a randomly selected
female student at...
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...
The table below reports the ages (in years) and the number of hours of sleep in...
The table below reports the ages (in years) and the number of
hours of sleep in one night by seven adults.
Age,x 35
20 59 42
68 38 75
Hours of sleep,
y 7 9
5 6 5 8
4
? = 7, ∑ ? = 337, ∑ ? 2 = 18563, ∑ ? = 44, ∑ ? 2 = 296 , ∑ ? ? =
1916
a. Find the coefficent of correlation between ? ??? ? and
interpret its meaning in the context of the problem.
b....
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