The University of Michigan's business school claims it has the highest average GPA in the Big...
The University of Michigan's business school claims it has the highest average GPA in the Big 10 among its business students. The business school claims that the business student average GPA is 3.5. Your friend believes that Michigan's claims are falsely inflated. In an effort to prove whether the grades are falsely inflated, your friend collects a random sample of 100 business students from Michigan and gets an average GPA of 3.31 with a standard deviation of 0.3.
Choose the relevant test statistic and description:
A. z test for population mean with sigma unknown.
B. t test for population mean with sigma unknown.
C. z test for population mean with sigma known.
D. t test for population mean with sigma known.
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The University of Michigan's business school claims it has the highest average GPA in the Big...
The University of Michigan's business school claims it has the highest average GPA in the Big...
The University of Michigan's business school claims it has the highest average GPA in the Big 10 among its business students. The business school claims that the business student average GPA is 3.5. Your friend believes that Michigan's claims are falsely inflated. In an effort to prove whether the grades are falsely inflated, your friend collects a random sample of 100 business students from Michigan and gets an average GPA of 3.31 with a standard deviation of 0.3. 1.5. Question...
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...
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...
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 researcher wants to know if students at UCLA have a similar GPA average as all...
A researcher wants to know if students at UCLA have a similar GPA average as all college students world-wide. The world wide average is 2.8 with a standard deviation of 0.44. The researcher randomly gets the GPA of 100 UCLA students and determines the sample mean to be 2.7 with a standard deviation of 0.38. What is the best statistical test to use to determine if the GPA of UCLA students is similar to the world wide average? A. One...
A principal claims the students in his school have above-average test scores for a particular standardized...
A principal claims the students in his school have above-average test scores for a particular standardized test. A sample of 50 students from his school were found to have an average test score of 77.2. The population mean for test scores for this particular test is 75, with a standard deviation of 9 (so we can assume that the population test score is normally distributed). Set up a hypothesis test to determine whether this principal’s claim is correct (use alpha...
A school authority claims that the average height of students is 178 cm. A researcher has...
A school authority claims that the average height of students is 178 cm. A researcher has taken a well-designed survey and his sample mean is 177.5 cm and the sample standard deviation is 2. The sample size is 25. Which statement is correct? a.) The result of the survey is statistically significant. b.) The sample mean and population mean is the same. c.) The result of the survey is biased. d.) The difference exists due to chance since the test statistic is small
A guidance counselor claims that the high school students in a college preparation program have higher...
A guidance counselor claims that the high school students in a college preparation program have higher ACT scores than those in a general program. The sample mean ACT scores for 37 high school students in a college prep program is 22.7 and assume the population standard deviation is 3.5. The sample mean ACT scores for 35 high school students in a general prep program is 21.1. Assume the population standard deviation is 4.9. At = 0.02 , test the...
A behavioral psychologist would like to see if average high school GPA depends on whether the...
A behavioral psychologist would like to see if average
high school GPA depends on whether the student is a user of
e-cigarettes (such as a JUUL) or not. She conducted an independent
samples t-test comparing the means of high school GPA between
students who have used an e-cigarette within the past 7 days and
students who have not used an e-cigarette within the past 7
days.
The results of this hypothesis test Ho: µ1 = μ2 vs. Ha:
µ1 ≠...
"Tarzan lights, Inc" claims that its compact fluorescent bulbs average no more than 3.50 mg of...
"Tarzan lights, Inc" claims that its compact fluorescent bulbs average no more than 3.50 mg of mercury. A sample of 25 bulbs shows a mean of 3.59 mg of mercury. As the company's statistician, you are worried that the lot may be defective for having too much mercury. Assume a known population standard deviation of 0.18, the population has a normal distribution, and a = .01. What kind of test should be done here? Seleccione una: O a. binomial test...
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 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...
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 school authority claims that the average height of students is 178 cm. A researcher has taken a well-designed survey and his sample mean is 177.5 cm and the sample standard deviation is 2. The sample size is 25. Which statement is correct? a.) The result of the survey is statistically significant. b.) The sample mean and population mean is the same. c.) The result of the survey is biased. d.) The difference exists due to chance since the test statistic is small
A behavioral psychologist would like to see if average
high school GPA depends on whether the student is a user of
e-cigarettes (such as a JUUL) or not. She conducted an independent
samples t-test comparing the means of high school GPA between
students who have used an e-cigarette within the past 7 days and
students who have not used an e-cigarette within the past 7
days.
The results of this hypothesis test Ho: µ1 = μ2 vs. Ha:
µ1 ≠...
"Tarzan lights, Inc" claims that its compact fluorescent bulbs average no more than 3.50 mg of mercury. A sample of 25 bulbs shows a mean of 3.59 mg of mercury. As the company's statistician, you are worried that the lot may be defective for having too much mercury. Assume a known population standard deviation of 0.18, the population has a normal distribution, and a = .01. What kind of test should be done here? Seleccione una: O a. binomial test...
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