Asimple random sample is drawn from a normally distributed population, and when making a statistical inference about the population mean, the margin of error is found to be 5.9 at a 95% level of confidence. if the mean of the sample is 18.7, what is the 95% confidence interval for the population mean? a. 18.7 ± 5.9 b. 18.7 ± 9.7 c. 18.7 ± 11.6 d. 18.7 ± 15.2the answer is a

A.

Step-by-step explanation:

The margin of error represents the maximum expected difference between the true parameter and the estimated parameter. It is a way to represent what the uncertainty is with a certain statistic.

Mathematically, confidence interval is

Here, the mean is 18.7 and the margin of error is 5.9, so confidence interval will be,

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

there are 70 more legs than eyes at the dog show (196 – 126 = 70). dogs have two more legs than eyes, and humans have the same number of legs as eyes. thus 70 is twice the number of dogs at the show, so the number of dogs is half of 70, which is 35. to get the number of humans, subtract 35 from 63: 63 – 35 = 28.

step-by-step explanation: