Answer:

Step-by-step explanation:
-For a known standard deviation, the sample size for a desired margin of error is calculated using the formula:

Where:
is the standard deviation
is the desired margin of error.
We substitute our given values to calculate the sample size:

Hence, the smallest desired sample size is 23
Answer:
your answer is D
Step-by-step explanation:
hope this helps
Answer:
could you include a pic please?
Answer:
x= -2
Step-by-step explanation:
MARK AS BRAINLIEST!!
Answer:
5 hours
Step-by-step explanation:
31-11 = 20
20/4 = 5