Asimple random sample of 64 observations was taken from a large population. the sample mean and the standard deviation were determined to be 320 and 120 respectively. the estimated standard error of the mean is

The estimated standard error of the mean is 15

Step-by-step explanation:

The standard error a sample mean is given by the following formula:

In which s is the standard deviation of the sample and n is the size of the sample.

In this problem, we have that:

.

So

The estimated standard error of the mean is 15

the f

last graph i believe

step-by-step explanation:

worked it out i believe

step-by-step explanation:

the options are kind of confusing. i can tell you what i see going on here when i look at the graph.

the class and exam medians are closely related, and it looks like the low outlier on the exam did pull the median lower. [tex][/tex]