A construction engineer collected data from some construction sites on the quantity of gravel (in metric tons) used in mixing concrete. The quantity of gravel for 24 sites were found to have a sample mean of 5818 tons and a variance of 2697 tons. Determine the estimated standard error, along with the interval estimate of the population mean with 90%confidence.(Assume the sample mean has a normal distribution)

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!

113.1

step-by-step explanation:

v=4

3πr3=4

3·π·33≈113.09734

for future students the answer is b

hope i

-lavira: )

answer:

24pi or letter c