Two accounting professors decided to compare the variance of their grading procedures. To accomplish this, they...

Question

Question

Two accounting professors decided to compare the variance of their grading procedures. To accomplish this, they...

Two accounting professors decided to compare the variance of their grading procedures. To accomplish this, they each graded the same 10 exams, with the following results:

	Mean Grade	Standard Deviation
Professor 1	79.3	22.4
Professor 2	82.1	12.0

At the 2% level of significance, what is the decision?

Multiple Choice

A) Reject the null hypothesis and conclude the variances are different.
B) Fail to reject the null hypothesis and conclude the variances are different.
C) Reject the null hypothesis and conclude the variances are the same.
D) Fail to reject the null hypothesis and conclude the variances are the same.

At the 10% level of significance, what is the decision regarding the null hypothesis?

Multiple Choice

A) Reject the null hypothesis and conclude the variances are different.
B) Fail to reject the null hypothesis and conclude no significant difference in the variances.
C) Reject the null hypothesis and conclude the variances are the same.
D) Fail to reject the null hypothesis and conclude the variances are the same.

math Statistics-And-Probability

Add a comment Improve this question Transcribed image text

Answer 1

Answer #1

Add a comment

Answer 2

Similar Homework Help Questions

Two accounting professors decided to compare the variance of their grading procedures. To accomplish this, they...

Two accounting professors decided to compare the variance of their grading procedures. To accomplish this, they each graded the same 10 exams with the following results. What is the calculated F ratio is ? Mean Grade Standard Deviation Professor 1 79.3 22.4 Professor 2 82.1 12.0 Select one: a. 3.48 b. 5.35 c. 3.18 d. 1.87 e. 1.87
20. Accounting procedures allow a business to evaluate its inventory costs based on two methods: LIFO...

20. Accounting procedures allow a business to evaluate its inventory costs based on two methods: LIFO (Last In First Out) or FIFO (First In First Out). A manufacturer evaluated its finished goods inventory (in $000s) for five products with the LIFO and FIFO methods. To analyze the difference, they computed (FIFO − LIFO) for each product. Based on the following results, does the LIFO method result in a lower cost of inventory than the FIFO method? Product FIFO (F) LIFO...
Well help Two professors at a local college developed a new teaching curriculum designed to increase...

Well help Two professors at a local college developed a new teaching curriculum designed to increase students' grades in math classes. In a typical developmental math course 56% of the students complete the course with a letter grade of A, B, or C. In the experimental course, of the 17 students enrolled, 13 completed the course with a letter grade of A, B, or C. Is the experimental course effective at the u=0.01 level of significance? Complete parts (a) through...

Multiple Choice: Question #1 A two tailed hypothesis test is being used to evaluate a treatment...

Multiple Choice: Question #1 A two tailed hypothesis test is being used to evaluate a treatment effect with ( a = .05). if the sample data produce a Z-score of ( z= -2.24), what is the correct decision? A. Reject the null hypothesis and conclude that the treatment has no effect B. Reject the null hypothesis and conclude that the treatment has an effect C. Fail to reject the null Hypothesis and conclude that the treatment has no effect D....
A professor in the Business department wants to know if there is a significant difference in...

A professor in the Business department wants to know if there is a significant difference in the performance on the first exam between two different classes. One class meets in the morning while the other meets at night. The results of this test are listed below along with an excel analysis conducted at the 5% significance level (α=0.05). t-Test: Two-Sample Assuming Equal Variances 8 am Class 7 pm Class Sample Mean 80.471 76.846 Sample Variance 97.51 162.14 Sample Observations 17...
Two professors at a local college developed a new teaching curriculum designed to increase students' grades...

Two professors at a local college developed a new teaching curriculum designed to increase students' grades in math classes. In a typical developmental math course, 48% of the students complete the course with a letter grade of A, B, or C. In the experimental course, of the 17 students enrolled, 11 completed the course with a letter grade of A, B, or C. Is the experimental course effective at the a=0.1 level of significance? Complete parts (a) through (g). Because...

Given below are the analysis of variance results from a Minitab display. Assume that you want...

Given below are the analysis of variance results from a Minitab display. Assume that you want to use a 0.05 significance level in testing the null hypothesis that the different samples come from populations with the same mean. 15) Fill in the Blank. What's the P-Value? What can you conclude about the equality of the population means? Source DF SS MS F P Factor 3 13.500 4.500 5.17 0.011 Error 16 13.925 0.870 Total 1927.425 O p=0.870, reject HO OP-Value...
Given below are the analysis of variance results from a Minitab display. Assume that you want...

Given below are the analysis of variance results from a Minitab display. Assume that you want to use a 0.05 significance level in testing the null hypothesis that the different samples come from populations with the same mean. 15) Fill in the Blank. What's the P-Value? What can you conclude about the equality of the population means? Source DF SS MS F P Factor 3 13.500 4.500 5.17 0.011 Error 16 13.925 0.870 Total 1927.425 O p=0.870, reject HO OP-Value...
JP Two professors at a local college developed a new teaching curriculum designed to increase students'...

JP Two professors at a local college developed a new teaching curriculum designed to increase students' grades in math classes. In a typical developmental math course, 43% of the students complete the course with a letter grade of A, B, or C. In the experimental course of the 17 students enrolled, 11 completed the course with a letter grade of A, B, or C. Is the experimental course effective at the a=0.1 level of significance? Complete parts (a) through (9)...

In order to compare the means of two populations, independent random samples of 400 observations are...

In order to compare the means of two populations, independent random samples of 400 observations are selected from each population, with the results found in the table to the right. Complete parts a through e below. Sample 1 overbar x = 5,305 s1= 154 Sample 2 overbar x = 5,266 s2 = 199 a. Use a 95% confidence interval to estimate the difference between the population means (mu 1 - mu 2). Interpret the confidence interval. The confidence interval is...

Two accounting professors decided to compare the variance of their grading procedures. To accomplish this, they...

Homework Answers