24,717.
What you have to do is subtract 38,773-14,056 and then the answer would be 24,717. So all together 24,717 must be added to result in the sum of 38,773.
14,056+24,717=38,773.
Answer:
Step-by-step explanation:
Put hypotheses as:

(Two tailed test at 4%)
Since population std deviation is given we can do Z test.

Test statistic t = mean diff/se = 
p value=0.075
Since p >0.04 our alpha, we accept null hypothesis.
At alphaequals0.04, we cannot reject the company's claim
You would do 21 divided by 3 and get 7.
The answer is 7 kids are in the line.
Please vote my answer the brainiest if it was helpful!!
3,4,6,3,2,5,6,1,12,8,3,2 calculate the mean
Bas_tet [7]
The mean is the average.
Add all the numbers together than divide by the amount of numbers there are:
3 + 4 + 6 +3 + 2 + 5 + 6 + 1 + 12 + 8 + 3 + 2 = 55
there are 12 numbers.
Mean = 55 / 12 = 4.583
Round the answer as needed.