This question has been frustrating me for awhile. can anyone ? this is statistics.
41 random samples of monthly electric bill amounts are selected from a normally distributed population.
the samples have a mean of $108 and a standard deviation of $5.
construct a 98% confidence interval for the population standard deviation.

answer are

step-by-step explanation:

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!

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.

where's the diagram?

step-by-step explanation: