A random sample size of 450 is drawn from a large population. The population standard deviation is 1.6. The sample mean is 27.9. Estimate the size of the population mean, including margin of error.

The size of the population mean would be provided as:

mean +/- std/sqrt(sample size)

<=>

27.9 +/- 1.6/sqrt(450)

<=>

27.9 +/- 0.75

=> Option A is correct.

Hope this helps!

:)

b or 2, just plug these equations into your graphing calculator then check the graph to see the image. if it matches up then that's your answer!