Question

Can some one help me with these two?
A field test for a new exam was given to randomly selected seniors. The exams were graded, and the sample mean and sample standard deviation were calculated. Based on the results, the exam creator claims that on the same exam, nine times out of ten, seniors will have an average score within 5% of 75%.

Is the confidence interval at 90%, 95%, or 99%? What is the margin of error? Calculate the confidence interval and explain what it means in terms of the situation.

Answer 1

This problem too please!!

Answer 2

i have to come up with the answers, they're not given.

Answer 3

Umm I don’t know

Answer 4

@AZ
Can you help me with this?

Answer 5

What u need

Answer 6

This on the first question:
Is the confidence interval at 90%, 95%, or 99%? What is the margin of error? Calculate the confidence interval and explain what it means in terms of the situation.

Answer 7

This on the second:
Part 1: What is the angle measure, in degrees and rounded to the nearest tenth, through which the larger gear has rotated when the smaller gear has made one complete rotation?

Part 2: How many rotations will the smaller gear make during one complete rotation of the larger gear?

Answer 8

1. Find the circumference of both circles
2. Find the ratio of circumferences

Answer 9

thank you for the help!

Answer 10

Did you manage to solve it?

Answer 11

yes

Answer 12

Good