Answer:
x=2
Step-by-step explanation:
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:
<span>the answer would be 79.623 times 4.83</span>
Answer:
Tree c
Step-by-step explanation: