**Module 4: ***Content Mastery Testing *

**Instructions**

After studying and reviewing the concepts and practices of Module 4, answer the following questions:

- A sample size of 35 scores has a mean score of 85 points with a standard deviation of 3.25 points.
*Is there any statistical evidence that the grade population mean is less than 75 points (α = 5%)? Greater than 85 points (α = 10%)* - A sample size of 49 students has a mean weight of 205 pounds with a standard deviation of 5.8 pounds. Find a 95% confidence interval for the weight population mean.
*Is there any statistical evidence that the weight population mean is less than 200 pounds (α = 1%)?* - The following data represents the annual average salary ($) of a sample of nine Social Workers.

42,640 | 41,830 | 46,990 | 50,690 | 40,950 | 41,460 | 48,670 | 40,090 | 44,720 |

- If the data comes from a normally distributed population with µ = $48,920,
*Is there any statistical evidence that*the average salary of Social Workers is less than $45,000 for a significance level of 10%?

Be sure to review the academic expectations for your submission.

**Submission Instructions:**

- Submit your assignment by 11:59 PM Eastern on Sunday.
- Review the rubric to determine how your assignment will be graded.
- Your assignment will be run through Turnitin to check for plagiarism.
- Justify any assumption and show all the steps to solve the exercises.

**Module 4: ***Content Mastery Testing *

**Instructions**

After studying and reviewing the concepts and practices of Module 4, answer the following questions:

- A sample size of 35 scores has a mean score of 85 points with a standard deviation of 3.25 points.
*Is there any statistical evidence that the grade population mean is less than 75 points (α = 5%)? Greater than 85 points (α = 10%)* - A sample size of 49 students has a mean weight of 205 pounds with a standard deviation of 5.8 pounds. Find a 95% confidence interval for the weight population mean.
*Is there any statistical evidence that the weight population mean is less than 200 pounds (α = 1%)?* - The following data represents the annual average salary ($) of a sample of nine Social Workers.

42,640 | 41,830 | 46,990 | 50,690 | 40,950 | 41,460 | 48,670 | 40,090 | 44,720 |

- If the data comes from a normally distributed population with µ = $48,920,
*Is there any statistical evidence that*the average salary of Social Workers is less than $45, 000 for a significance level of 10%?

Be sure to review the academic expectations for your submission.

**Submission Instructions:**

- Submit your assignment by 11:59 PM Eastern on Sunday.
- Review the rubric to determine how your assignment will be graded.
- Your assignment will be run through Turnitin to check for plagiarism.
- Justify any assumption and show all the steps to solve the exercises.