There are 4 cards facing up and the rest facing down
Answer:

Step-by-step explanation:
<u>Confidence Interval</u>
When the population standard deviation
is known, the formula for a confidence interval for a population mean
is:

Where n is the sample size and z is the corresponding z-value from the standard normal distribution for the selected confidence level. The value of z for a 95% confidence interval is z=1.96. The rest of the values are

Calculating the confidence interval


Or, equivalently

Answer:
i think but I am not sure so maybe ask somebody else but I think it is A.
Step-by-step explanation:
I just think it is
Answer: 1/16
0.0625
Step-by-step explanation:
Answer Best buy
Step-by-step explanation:
Correct me if I'm wrong!