The 99% confidence interval for the true mean is given by:

where:

is the sample mean = 69.7

is the standard deviation = 2.8

is the test statistics = 2.58 for for 99% confidentce interval.
n is the sample size = 772.
Therefore, the 99% confidence interval is:
Answer:
last one
Step-by-step explanation: 25 divided by four is 6.25
Answer:
-2X/3+3
Step-by-step explanation:
I think the answer would be c
Answer:
3/1 or 3
Step-by-step explanation:
It rises up three and to the side one