Measure of central tendency and variation.
(a) Percent protein content was measured for six samples of hay.
The data collected were: 23, 15, 15, 11, 9 and 12.
Compute the sample mean and sample standard deviation.
(b) A second study measured the percent protein content for one hundred samples of hay from randomly selected hay fields in Missouri. The sum of the observed percentages and the sum of the squared observations were:
find out the sample mean and sample standard deviation.