Question
6. The grade point average for 10 randomly selected college students is: 2.9, 3.1, 3.4, 3.6,...
6. The grade point average for 10 randomly selected college students is: 2.9, 3.1, 3.4, 3.6, 3.1, 4.0, 2.5, 3.7, 3.0, 2.5.( Assume the sample is taken from a normal distribution)
a) Find the sample mean. (show all work)
b) Find the sample standard deviation.
c) Construct a 99% C. I. for the population mean
Homework Answers
Answer #1
Not the answer you're looking for?
Similar Questions
The grade point averages (GPA) of 18 randomly selected college students are used to estimate the...
The grade point averages (GPA) of 18 randomly selected college
students are used to estimate the mean GPA of the college students.
The GPAs from the sample are as follows: 2.3 3.3 2.6 1.8 0.9 3.1
4.0 0.7 3.1 2.3 2.0 3.1 3.4 1.3 2.6 2.6 3.7 2.2
a- Would it be justified if the standard normal distribution is
used to construct the confidence interval? Explain.
b-If the population is assumed to be normally distributed,
construct a 98% confidence interval...
12. ANALYSIS OF VARIANCE The average of grade point averages (GPAs) of college courses in a...
12. ANALYSIS
OF VARIANCE
The average of grade
point averages (GPAs) of college courses in a specific major is a
measure of difficulty of the major. An educator wishes to conduct a
study to find out whether the difficulty levels of different majors
are the same. For such a study, a random sample of major grade
point averages (GPA) of 8 graduating seniors at a large university
is selected for each of the four majors mathematics, English,
Education, and Biology...
Grade averages for 10 randomly selected college students are listed below. Assume the point averages are...
Grade averages for 10 randomly selected college students are
listed below. Assume the point averages are normally distributed.
Find a 98% confidence interval for the actual mean. Round to the
nearest hundredth.
2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8
The grade point averages (GPA) for 12 randomly selected college students are shown on the right....
The grade point averages (GPA) for 12 randomly selected college
students are shown on the right. Complete parts (a) through (c)
below. Assume the population is normally distributed.
2.3 3.4 2.8 1.8 0.9 4.0 2.5 1.1 3.8 0.5 2.2 3.2
(a) Find the sample mean. x overbarequals =
(Round to two decimal places as needed.)
(b) Find the sample standard deviation. sequals =
(Round to two decimal places as needed.)
(c) Construct a 95% confidence interval for the population
mean...
Build a stem-and-leaf plot for these measurements 3.1 4.9 2.8 3.6 2.5 4.5 3.5 3.7 4.1...
Build a stem-and-leaf plot for these measurements
3.1
4.9
2.8
3.6
2.5
4.5
3.5
3.7
4.1
4.9
2.9
2.1
3.5
4.0
3.7
2.7
4.0
4.4
3.7
4.2
3.8
6.2
2.5
2.9
2.8
5.1
1.8
5.6
2.2
3.4
2.5
3.6
5.1
4.8
1.6
3.6
6.1
4.7
3.9
3.9
4.3
5.7
3.7
4.6
4.0
5.6
4.9
4.2
3.1
3.9
A. Describe the form of data distribution. Do you notice any
unusual results?
B. Use the stem-and-leaf plot to find the minimum
observation....
The grade point average of 4 randomly selected college students is recorded at the end of...
The grade point average of 4 randomly selected college students
is recorded at the end of the fall and spring semesters of their
senior year, as follows:
Student
1
2
3
4
Fall
2.5
1.8
2.2
3.3
Spring
1.6
2.5
2.5
2.8
Round your answers to three decimal places.
(a). The mean difference in GPA (Spring - Fall)
is:
(b). The standard deviation of the difference in GPA (Spring -
Fall) is:
(c). Using your answers from above, construct a...
Data shows the times for carrying out a blood test at Rivervalley Labs Using Excel Plot...
Data shows the times for carrying out a blood test at
Rivervalley Labs
Using Excel Plot a histogram of the data. What type of
distribution does the data appear to follow?
Construct and interpret the 95% confidence interval for the
population mean time for carrying out a blood test. Assume that the
population standard deviation is unknown.
Times for blood tests (minutes)
2.5
4.9
3.6
4.3
1.9
3.4
3.2
4.0
3.1
3.6
3.9
4.4
3.9
3.1
2.7
3.5
3.6
3.7...
The grade point averages (GPA) for 12 randomly selected college students are shown below. Complete parts...
The grade point averages (GPA) for 12 randomly selected college
students are shown below. Complete parts (a) through (c)
below.
Assume the population is normally distributed.
2.3
3.3
2.7
1.8
0.9
4
2.2
1.4
3.9
0.5
2.3
3.2
(a) Find the sample mean= (Round to two decimal
places as needed.)
(b) Find sample Standard deviation= (Round to two
decimal places as needed.)
(C) construct 90% confidence interval= _ , _
(Round to two decimal places as needed.)
The average grade point average (GPA) of undergraduate students in New York is normally distributed with...
The average grade point average (GPA) of undergraduate students
in New York is normally distributed with a population mean of 2.5
and a population standard deviation of 0.4 Mean = 2.5 Standard
Deviation = 0.4 (IV) If a sample of 36 students is taken, what is
the probability that the sample mean GPA will be between 2.5 and
2.75? N= 36
Listed in the accompanying data table are student evaluation ratings of courses and professors, where a...
Listed in the accompanying data table are student evaluation
ratings of courses and professors, where a rating of 5 is for
"excellent." Assume that each sample is a simple random sample
obtained from a population with a normal distribution.
a. Use the 93 course evaluations to construct a 98%
confidence interval estimate of the standard deviation of the
population from which the sample was obtained.
b. Repeat part (a) using the 93 professor
evaluations.
c. Compare the results from part...
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 6 minutes ago
asked 20 minutes ago
asked 24 minutes ago
asked 34 minutes ago
asked 51 minutes ago
asked 51 minutes ago
asked 52 minutes ago
asked 56 minutes ago
asked 58 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago