The president of a university claims that the mean time spent partying by all students at...
The president of a university claims that the mean
time spent
partying by all students at this university is not more than 7
hours per
week. A random sample of 40 students taken from this university
showed
that they spent an average of 7.5 hours partying the previous week
with
a sample standard deviation of 2.3 hours. Use the p-value approach
to
test at a 5% significance level whether the president’s claim is
true.
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The president of a university claims that the mean
time spent
partying by all students at...
The president of a university claims that the mean time spent partying by all students at...
The president of a university claims that the mean time spent partying by all students at this university is not more than 7 hours per week. A random sample of 40 students taken from this university showed that they spent an average of 9.50 hours partying the previous week with a standard deviation of 2.3 hours. Test at a significance level 0f 2.5 % whether the presiden
An employee group for a retailer claims that the mean time spent by employees on a...
An employee group for a retailer claims that the mean time spent by employees on a personal phone call is less than 10 minutes per day. A random sample of 25 employees is taken and showed a mean of 9.2 minutes and a standard deviation of 2 minutes. Test the claim with a 5% significance level the time is less than 10 minutes.
(Test on a Mean, Sigma Unknown): A random sample of 12 first-year university students enrolled in...
(Test on a Mean, Sigma Unknown): A random sample of 12 first-year university students enrolled in MATH 1051H was drawn. At the course's completion, each student was asked how many hours he or she spent doing homework in statistics. The data are listed below. (28, 36, 38, 37, 32,36), (31, 31, 40, 40, 41, 36) You estimate that the population standard deviation is 7. The instructor has recommended that students devote 3 hours per week for the duration of the...
A book about different colleges' reports that the mean time students at a particular university study...
A book about different colleges' reports that the mean time students at a particular university study each week is 1015 minutes. A dean says she believes the mean is greater than 1015 minutes. To test her claim, she takes a random sample of 64 students and finds that the sample mean is 1050 minutes, with standard deviation 150 minutes 4. Show that this meets the requirements for a significance test for a mean. State the null hypothesis and the alternate...
Q: Previous study conducted at the Texas State University reported that first year college students spent...
Q: Previous study conducted at the Texas State University reported that first year college students spent 5 hours per week, on average, speaking phone. The students statistics club assumes that, currently, the mean is higher. 125 randomly chosen first-year college students were asked how many hours per week they spend talking by phone. The sample mean was 5.94 hours with a sample standard deviation of 6.37 hours. a. What is the population parameter to test? b. What is the sample...
The average GPA score for students at a university was 3.75. Five years later, a professor...
The average GPA score for students at a university was 3.75. Five years later, a professor wants to perform a hypothesis test to determine whether the average GPA score of students at the university has changed. He picks a random sample of 50 students and obtains their mean GPA score, which is 3.10. The population standard deviation is known as 1.15. Test whether the claim that the average GPA score at the university has dropped from 3.75 is supported or...
The average GPA score for students at a university was 3.75. Five years later, a professor...
The average GPA score for students at a university was 3.75. Five years later, a professor wants to perform a hypothesis test to determine whether the average GPA score of students at the university has changed. He picks a random sample of 50 students and obtains their mean GPA score, which is 3.10. The population standard deviation is known as 1.15. Test whether the claim that the average GPA score at the university has dropped from 3.75 is supported or...
A recent national survey showed that the mean amount of time high school students spent per...
A recent national survey showed that the mean amount of time high school students spent per day using Snapchat was 65 minutes, with a standard deviation of 9 minutes. Mrs. Jones, a school principal, surveyed 100 of her students and computed a sample mean of 67.6 minutes of daily Snapchat use. She would like to determine, with a .01 significance level, whether her school is significantly different from the national results. State the null and alternate hypotheses for this two-tailed...
4. A random sample of 12 second-year university students enrolled in a business statistics course was...
4. A random sample of 12 second-year university students enrolled in a business statistics course was drawn. At the course's completion, each student was asked how many hours he or she spent doing homework in statistics. The data are listed below. It is known that the population standard deviation is o= 8.0. The instructor has recommended that students devote 3 hours per week for the duration of the 12-week semester, for a total of 36 hours. At 10% significance level...
4 pts X Ons wit in ap The average GPA score for students at a university...
4 pts X Ons wit in ap The average GPA score for students at a university was 3.75. rive years later, a professor wants to perform a hypothesis test to determine whether the average GPA score of students at the university has changed. He picks a random sample of 50 students and obtains their mean GPA score, which is 3.10. The population standard deviation is known as 1.15. Test whether the claim that the average GPA score at the university...
An employee group for a retailer claims that the mean time spent by employees on a personal phone call is less than 10 minutes per day. A random sample of 25 employees is taken and showed a mean of 9.2 minutes and a standard deviation of 2 minutes. Test the claim with a 5% significance level the time is less than 10 minutes.
A book about different colleges' reports that the mean time students at a particular university study each week is 1015 minutes. A dean says she believes the mean is greater than 1015 minutes. To test her claim, she takes a random sample of 64 students and finds that the sample mean is 1050 minutes, with standard deviation 150 minutes 4. Show that this meets the requirements for a significance test for a mean. State the null hypothesis and the alternate...
The average GPA score for students at a university was 3.75. Five years later, a professor wants to perform a hypothesis test to determine whether the average GPA score of students at the university has changed. He picks a random sample of 50 students and obtains their mean GPA score, which is 3.10. The population standard deviation is known as 1.15. Test whether the claim that the average GPA score at the university has dropped from 3.75 is supported or...
The average GPA score for students at a university was 3.75. Five years later, a professor wants to perform a hypothesis test to determine whether the average GPA score of students at the university has changed. He picks a random sample of 50 students and obtains their mean GPA score, which is 3.10. The population standard deviation is known as 1.15. Test whether the claim that the average GPA score at the university has dropped from 3.75 is supported or...
4. A random sample of 12 second-year university students enrolled in a business statistics course was drawn. At the course's completion, each student was asked how many hours he or she spent doing homework in statistics. The data are listed below. It is known that the population standard deviation is o= 8.0. The instructor has recommended that students devote 3 hours per week for the duration of the 12-week semester, for a total of 36 hours. At 10% significance level...
4 pts X Ons wit in ap The average GPA score for students at a university was 3.75. rive years later, a professor wants to perform a hypothesis test to determine whether the average GPA score of students at the university has changed. He picks a random sample of 50 students and obtains their mean GPA score, which is 3.10. The population standard deviation is known as 1.15. Test whether the claim that the average GPA score at the university...
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