# Statistics help?

posted by .

Hi there, I was looking for any assistance or help on how I would go about starting this assignment? Having difficulty understanding it. Thank you in advance.

"A stats instructor is interested in investigating time of day his lectures were held on student' test scores. He selected a sample of 15 students from his morning (n=7) and evening (n=8) statistics classes and recorded their midterm and final exam scores (shown below). He was interested in examining whether students performed better in morning vs. evening classes on their final exam scores. He also suspected poorer performance on the final exam compared to the midterm among those attending the morning class.

Morning Class (n=7):
Midterm | Final
80 | 59
80 | 64
75 | 65
92 | 70
78 | 67
79 | 58
69 | 79

Evening Class (n=8):
Midterm | Final
62 | 40
70 | 45
80 | 55
78 | 55
84 | 60
64 | 70
84 | 60
64 | 70
84 | 60
64 | 70
84 | 60
70 | 63

The instructor was also curious about what type of exam students preferred to receive in the course (multiple choice or short-answer). He observed the morning class, 6 students preferred multiple choice exams. Evening class, 2 students preferred multiple choice. Does he have evidence that 50% of the students preferred multiple choice exams in the evening class? Finally, can the instructor conclude that there is a relation between test type preference and time of class? If yes, please measure the strength of the relation."

• Statistics help? -

We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.

Are you going to consider the mid and final test scores separately or pool them?

Find the mean first = sum of scores/number of scores

Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.

Standard deviation = square root of variance

Z = (mean1 - mean2)/standard error (SE) of difference between means

SEdiff = √(SEmean1^2 + SEmean2^2)

SEm = SD/√n

If only one SD is provided, you can use just that to determine SEdiff.

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.

I'll let you do the calculations.

## Respond to this Question

 First Name School Subject Your Answer

## Similar Questions

1. ### Com 140

In this scenario, assume the role of a student. You have read assignment details in your course syllabus, but you are still unsure what to do. Think about how you would approach your instructor versus how you would approach a classmate …
2. ### statistics

How do ethics affect your chosen level of significance?
3. ### Communications

What purpose statement can I write to my instructor about not understanding my assignment?
4. ### com 140 Contemporary Business Communication

Characteristics of Interpersonal Communication Im having a little problem with this assignment not really sure what to do. There are 2 section on ths assignment 1 is Instructor message and 2 is Class mate message. In each section ther …
5. ### Characteristics of Interpersonal Communication

In this scenario, assume the role of a student. You have read assignment details in your course syllabus, but you are still unsure what to do. Think about how you would approach your instructor versus how you would approach a classmate …
6. ### comp 140

In this scenario, assume the role of a student. You have read assignment details in your course syllabus, but you are still unsure what to do. Think about how you would approach your instructor versus how you would approach a classmate …
7. ### English/Film and Media studies

Hi My assignment is to talk about a documentary that doesn't exist. We had to pretend to create one and one of the things we need to discuss is our shot construction so everything from lighting, location to shot sizes. Then we need …
8. ### English

the poem "At the Lunch Counter" is by Alden Nowlan. I am having difficulty understanding it. any help would be great.
9. ### English

the poem "At the Lunch Counter" is by Alden Nowlan. I am having difficulty understanding it. any help would be great.
10. ### Statistics on Psychology

Hi there, I was looking for any assistance or help on how I would go about starting this assignment?

More Similar Questions