Question

In: Statistics and Probability

This data is from college gpas. The hypothesis was GPA would be below 3. n=41 mean...

This data is from college gpas. The hypothesis was GPA would be below 3. n=41

mean

2.976

std dev

0.507

var

0.257

Q 9B.

  1. Test the hypothesis for the mean

  2. List the Null and Alternative Hypotheses. Use = 0.05 to make your decision about the Null Hypothesis

  3. Calculate the value of the test statistic to three decimal places.

  4. Calculate the p-value using the p-value calculator

Write your conclusion about the original claim using the table

Q 9C.

  1. Test the hypothesis for the variance that you proposed in Part 4  

  2. List the Null and Alternative Hypotheses

  3. Calculate the value of the test statistic to three decimal places.

  4. Calculate the p-value using the p-value calculator Excel spreadsheet available on Black Board.

  5. Use = 0.05 to make your decision about the Null Hypothesis and be sure to list it.

  6. Write your conclusion about the original claim using the table  

Solutions

Expert Solution

Dear you forget to provide Part 4 result inorder to do Q 9C. But yet I didn't skipped this question, since I like to help you in your studies. I provided a general term s , please put your value that you proposed in part 4 in that general term , then follow my steps you will get the answer.

Dear your satisfaction is more important, I provided answers with detailed explanation. If you are satisfied with my explanations please THUMBS UP.. Thanks inadvance for your support dear....


Related Solutions

In a university, the population mean GPA is 3.0 and the standard deviation of GPAs is...
In a university, the population mean GPA is 3.0 and the standard deviation of GPAs is 0.72. I’m going to draw samples of size n=100 The z-score of a sample average GPA of 2.95 is -0.69444444 The z-score of a sample average GPA of 2.8 is ____ The z-score of a sample average GPA of 2.9 is ____ The z-score of a sample average GPA of 3.15 is ____ The z-score of a sample average GPA of 3.25 is ____...
The mean GPA at a certain university is 2.80. The table contains GPAs for a random...
The mean GPA at a certain university is 2.80. The table contains GPAs for a random sample of 16 business students from this university. 2.27 3.05 2.57 3.36 3.10 3.03 3.19 3.08 2.60 2.92 2.77 3.55 2.63 2.79 2.70 2.92 What is the sample mean for this dataset? What is the sample standard deviation for this dataset? How many degrees of freedom are there? Perform a hypothesis test for this dataset. What is your conclusion?
The data below provides College GPA, High School GPA, SAT total score, and a number of...
The data below provides College GPA, High School GPA, SAT total score, and a number of letters of reference. a.Generate a model for college GPA as a function of the other three variables? b.Is this model useful? Justify your conclusion. c.Are any of the variables not useful predictors? Why? CGPA HSGPA SAT REF 2.04 2.01 1070 5 2.56 3.4 1254 6 3.75 3.68 1466 6 1.1 1.54 706 4 3 3.32 1160 5 0.05 0.33 756 3 1.38 0.36 1058...
Thirty GPAs from a randomly selected sample of statistics students at a college reported a mean...
Thirty GPAs from a randomly selected sample of statistics students at a college reported a mean of 3.11 and the standard deviation was 0.36. Assume that the population distribution is approximately Normal. The technician in charge of records claimed that the population mean GPA for the whole college is 2.88. The chair of the mathematics department claims that students typically have higher GPAs than the typical college student. Test this claim. State the null and alternative hypotheses Find the test...
Consider the following data regarding students' college GPAs and high school GPAs. The estimated regression equation...
Consider the following data regarding students' college GPAs and high school GPAs. The estimated regression equation is Estimated College GPA=0.67+0.6551(High School GPA).Estimated College GPA=0.67+0.6551(High School GPA). Compute the sum of squared errors (SSESSE) for the model. Round your answer to four decimal places. GPAs College GPA High School GPA 2.022.02 3.293.29 2.812.81 3.113.11 2.532.53 3.303.30 3.763.76 4.974.97 3.083.08 3.003.00 3.963.96 3.873.87
2.Thirty GPAs from a randomly selected sample of statistics students at a college are linked below....
2.Thirty GPAs from a randomly selected sample of statistics students at a college are linked below. Assume that the population distribution is approximately Normal. The technician in charge of records claimed that the population mean GPA for the whole college is 2.81. a. What is the sample​ mean? Is it higher or lower than the population mean of 2.81​? b. The chair of the mathematics department claims that statistics students typically have higher GPAs than the typical college student. Use...
3) Suppose you know the true mean GPA of Howard Community College and are interested in...
3) Suppose you know the true mean GPA of Howard Community College and are interested in seeing how students in your stats class compare to the college average. Compared to the sampling distribution of the means for small samples (say n = 4), how will the sampling distribution of the means be different for larger samples (say n = 25)? ​a.) The sampling distribution for n=25 will have a larger mean ​b.) The sampling distribution for n=25 will have a...
[Understanding of hypothesis testing] The College of Engineering would like to know if the mean incoming...
[Understanding of hypothesis testing] The College of Engineering would like to know if the mean incoming freshman ACT (America College Test) score for 2018 is statistically different than the mean ACT score across the country. *State the null (H0) and alternative (H1) statistical hypotheses to address this question. *If the College wants to be 95% confident in any conclusion, what is the value of the significance criterion? *If the College expects a 90% likelihood of detecting a difference among means,...
Statistics concepts for engineering management: The data in the table provides: College GPA, High School GPA,...
Statistics concepts for engineering management: The data in the table provides: College GPA, High School GPA, SAT total score, and number of letters of reference.    a. Generate a model for college GPA as a function of the other three variables.    b. Is this model useful? Justify your conclusion.    c. Are any of the variables not useful predictors? Why? CGPA   HSGPA   SAT   REF 2.04 2.01   1070   5 2.56 3.4   1254   6 3.75 3.68   1466   6 1.1 1.54   706  ...
Below is a set of data from a sample of n = 11: X 3 6...
Below is a set of data from a sample of n = 11: X 3 6 10 12 4 9 15 18 7 5 8 Y 9 18 30 36 12 27 45 54 21 15 24 Answer the following questions: (a) Calculate the covariance. (b) Calculate the coefficient of correlation. (c) What conclusions can you reach about the relationship between X and Y? Explain.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT