Question
In: Statistics and Probability
An ASU student spends (in normal times) an average of 1.2 hours to get to campus...
An ASU student spends (in normal times) an average of 1.2 hours to get to campus with a standard deviation of 0.2 hours.
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(a) (6 pts) Find the probability the average daily commute time for a period of 36 working days is between 1:15 in 1.25 hours.
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(b) (6 pts) Find the probability the total commute time for the 36 days is less than 40 hours.
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(c) (5 pts) What assumptions are necessary for the answers in parts (a) and (b) to be valid approximations.
Solutions
orchestra answered 2 years agoRelated Solutions
A typical college student spends an average of 2.55 hours a day using a computer. A...
A typical college student spends an average of 2.55
hours a day using a computer. A sample of 13 students at The
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sample standard deviation of 0.51 hours.
Can we conclude that the mean number of hours per day
using the computer by students at The University of Findlay is the
same as the typical student’s usage? Use the five
step hypothesis testing procedure and the 0.05 significance
level.
3. It is commonly said that the average college student spends 10 hours per week on...
3. It is commonly said that the average college student spends
10 hours per week on the Internet. It is common knowledge that the
population standard deviation is 16 hours/week. You believe that
the true average time that college students spend on the Internet
should not be 10 hours per week, and decide to collect your own
sample for a hypothesis test. You randomly sample 250 students from
your college and find that on average they spent 12.5 hours a...
According to one study, an average student spends 4.4 hours on leisure activities per day. Assuming...
According to one study, an average student spends 4.4 hours on
leisure activities per day. Assuming that the standard deviation of
leisure activities per day is .5 hour. You took a sample of 16
students. Calculate the following:
a. What is the probability that sample mean of leisure
activities per day is more than 4.5 hours?
b. Sample mean of leisure activities per day lies between 4.6
and 4.9 hours?
c. Sample mean of leisure activities per day is less...
National statistics show that the average middle school student spends 8.694 hours per week playing video...
National statistics show that the average middle school student
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4.50 9.75 9.50 8.25 5.00 14.50 11.00 4.00 8.25 11.25 11.75
15.50
Has the national average changed? State the hypotheses, check
conditions, compute test statistics, standardize and give degrees
of freedom. Include a sketch, state the p-value followed by your
conclusion.
You decide to study an important question of the average height of the ASU student body....
You decide to study an important question of the average height
of the ASU student body. The answer to this question is essential
to your future, so we need to study it correctly. You decide to
sample 64 students. You set up the following test: H_o: HYB Average
height ≥ 59 inches H_a: Average height < 59 inches.
1) Draw the table that shows the 4 possible scenarios of Reality
vs. Experimental Outcome. What are the types of errors? Which...
A statistics instructor wants to examine the relationship between the hours a student spends studying for...
A statistics instructor wants to examine the relationship
between the hours a student spends studying for the final exam
(Hours) and a student's grade on the final exam (Grade). She takes
a sample of five students.
Student
x (Hours)
y (Grade)
1
8
75
2
2
47
3
3
50
4
15
88
5
25
93
a. Computer the Average and Standard Deviation for x and y USING
EXCEL.
b. Computer the sample covariance for x & y USING EXCEL...
Scott is a junior business major. He is a good student and spends many hours studying....
Scott is a junior business major. He is a good student
and spends many hours studying. His exercise consists of walking to
classes and to the library. He loves to eat at Burger King at least
three times a week. He is 5 foot 10 inches tall and weighs 243
pounds. A 3-day dietary analysis reveals that Scott eats on an
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1.How many total calories...
A university student typically spends 15 hours a week on part-time jobs. An officer at a...
A university student
typically spends 15 hours a week on part-time jobs. An officer at a
university wants to determine if this amount has changed with the
current recession and increase in tuition fees. A sample of 39
students who hold part-time jobs is summarized and has sample mean,
= 16.69 and sample standard deviation, s = 7.61.
a) Investigate if
there is a reason to believe that there is a change in the average
amount of time per week...
A university student typically spends 15 hours a week on part-time jobs. An officer at a...
A university student
typically spends 15 hours a week on part-time jobs. An officer at a
university wants to determine if this amount has changed with the
current recession and increase in tuition fees. A sample of 39
students who hold part-time jobs is summarized and has sample mean,
= 16.69 and sample standard deviation, s = 7.61.
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Each month Old Billie spends between 5 and 45 hours in jail. All of these times...
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label it appropriately. b. What is the probability that Old Billie
spends more than 24 hours in jail in any particular month? c. What
is the probability that Old Billie spends exactly 40 hours in jail
in any particular month? d. How many...
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