Answer: 
Step-by-step explanation:
The confidence interval for population mean is given by :-
Given : 
n=23, which is a small sample(n<30), so we use t-test.
Significance level: 
Critical value : 
Then , the confidence interval for population mean will be :-
Hence, the 95% confidence interval for the population mean is
Answer:
5
Step-by-step explanation:
If the contestant has 9 minutes for 45 hotdogs, then you would have to divide 45 by 9 to get the answer. 45 divided by 9 is 5.
Then, to see if your answer makes sense, you would multiply 9 by 5 to see if you get 45, which you do.
Answer:
the number of pensioners in the sample is 40
Step-by-step explanation:
The computation of the number of pensioners in the sample is shown below:
Given that
The Ratio of children to adult visitors is 1:2
The ratio of adults to pensioners is 3:4
And, the total number of seats is 85
Based on the above information,
The common ratios we could write as
1.5 : 3 : 4
Now we doubled it
3 : 6 : 8
So, the number of pensioners in the sample is
= 85 × 8 ÷ (3 + 6 +8)
= 40
Hence, the number of pensioners in the sample is 40
Answer:
(11 x 2) - 7 + 4
Is your algebra expression.
