Question
In: Statistics and Probability
Another researcher found that the hours of sleep for female students is normally distributed with a...
Another researcher found that the hours of sleep for female students is normally distributed with a mean of 7.17 hours and a standard deviation of 16 minutes.
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(1 mark) What is the probability that a randomly selected female student at the college sleep less than 7.28 hours? (4dp) Answer
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What is the probability that a randomly selected female student at the college sleep more than 7.15 hours? (4dp) Answer
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What is the probability that a randomly selected female student at the college sleeps between 7.06 and 7.39 hours? (4dp) Answer
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(1 mark) If the hours of sleep for a female student was on the 65th percentile, how many hours would she be sleeping? (2dp) Answer hours
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In a sample of 41 female students, how many of them would be expected to sleep more than 7.15 hours? (2 dp)
Solutions
orchestra answered 1 year agoRelated Solutions
Another researcher found that the hours of sleep for female students is normally distributed with a...
Another researcher found that the hours of sleep for female
students is normally distributed with a mean of 8 hours and a
standard deviation of 25.81 minutes.
(1 mark) What is the probability that a randomly selected female
student at the college sleep less than 8.12 hours?
(4dp) Answer
What is the probability that a randomly selected
female student at the college sleep more than 7.98 hours?
(4dp) Answer
What is the probability that a randomly selected
female student at the college...
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...
The heights of female students in a university are approx normally distributed with a mean of...
The heights of female students in a university are approx
normally distributed with a mean of 162 cm and a standard dev of 8
cm. Explain your answers.
a) Approx 68% of all female students in a university will have
heights between ____ cm and ____ cm.
b) Heights greater than ____ cm would be considered
peculiar.
A researcher calculated average sleep hours per night for a random sample of (n= 5454) students....
A researcher calculated average sleep hours per night for a
random sample of (n= 5454) students. The researcher hypothesised
that a healthy person is expected to sleep 8.58.5 hours per night
(μ0=8.5μ0=8.5). The sample mean y¯y¯ is equal to 8.28.2 hours and
the sample variance s2n−1sn−12 is equal to 1.181.18 hours.
Research Question: Is the average hours of sleep equal to
hypothesised hours of sleep per night?
Answer the following questions by choosing the most correct
option or typing the...
A researcher calculated average sleep hours per night for a random sample of (n= 4646) students....
A researcher calculated average sleep hours per night for a
random sample of (n= 4646) students. The researcher hypothesised
that a healthy person is expected to sleep 88 hours per night
(μ0=8μ0=8). The sample mean y¯y¯ is equal to 7.97.9 hours and the
sample variance s2n−1sn−12 is equal to 1.241.24 hours.
Research Question: Is the average hours of sleep equal to
hypothesised hours of sleep per night?
Answer the following questions by choosing the most correct
option or typing the...
1. Assume that female students’ heights are normally distributed with a mean given by µ =...
1. Assume that female students’ heights are normally distributed
with a mean given by µ = 64.2 in. and a standard deviation given by
σ =2.6 in.
a) If one female student is randomly selected, find the
probability that her height is between 64.2 in. and 66.2 in.
b) If 25 female students are randomly selected, find the
probability that they have a mean height between 64.2 in. and 66.2
in.
Assume that female students’ heights are normally distributed with a mean given by µ = 64.2...
Assume that female students’ heights are normally distributed
with a mean given by µ = 64.2 in. and a standard deviation given by
σ =2.6 in.
a) If one female student is randomly selected, find the
probability that her height is between 64.2 inches and 66.2
inches
b) If 25 female students are randomly selected, find the
probability that they have a mean height between 64.2 inches and
66.2 inches
1. The number of hours that biology students study per week is normally distributed with a...
1. The number of hours that biology students study per week is
normally distributed with a mean of 15 hours and a standard
deviation of 5 hours.
a. Draw an approximate picture of the distribution of weekly
hours studied for biology students.
b. If a student is chosen at random, what is the probability
that the student studies less than 11 hours per week? Include a
picture that graphically shows the portion of students that study
less than 11 hours...
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....
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