quarrella
08.12.2020 •
Mathematics
Theo solved the following problem correctly for homework. 2 x + y = 7. Negative 3 x + y = 2. What is the y-coordinate of his solution? y = negative 3 y = negative 1 y = 1 y = 5 AND ILL GIVE BRAINLIEST
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Ответ:
(a)
(b) The best point estimate of
is the sample mean 
The margin of error = 4.552
Step-by-step explanation:
Given : The confidence interval for the population mean = (13.046 , 22.15)
Sample mean :
Standard deviation :
Sample size :
a. Let
represents the population mean.
Then we can write the confidence interval for the population mean as :-
b. The best point estimate of
is the sample mean 
Also, the lower limit of confidence interval can be written as
i.e.
Hence, the margin of error = 4.552