What is the mean of the sample means? pick from these:

The mean of the sample means is equal to the population mean, divided by the square root of the sample size.

The mean of the sample means is undefined because all possible sample means can never be found.

The mean of the sample means is equal to the population mean, divided by the sample size.

The mean of the sample means is equal to the population mean.

The mean of the sample means is equal to the population mean, divided by the population standard deviation.

sample mean is an average value found in a sample.

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.