3. (09.07) A field test for a new exam was given to randomly selected seniors. The exars 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 3% of 69%.
Is the confidence interval at 90%, 95%, or 99%? What is the margin of error? Calculate the confidence interval and explain what it means
terms of the situation. (10 points)

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!

so, converting firstly the mixed fractions to improper fractions and then "adding".