Assume that a sample is used to estimate a population mean μ. find the margin of error m. e. that corresponds to a sample of size 14 with a mean of 21.6 and a standard deviation of 12.6 at a confidence level of 99%.report me accurate to one decimal place because the sample statistics are presented with this accuracy.

16.2

Step-by-step explanation:

Margin of Error formula :-

Given : Sample size : n= 4

Mean :

Standard deviation:

Significance level :

Now, the margin of error for the sample :-

                [by using standard normal distribution table]

Hence, the margin of error for the given sample =16.2

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204