One hundred and ninety undergraduate students were randomly

One hundred and ninety undergraduate students were randomly selected from a university that has 47,000 students in total. Systolic blood pressure was tested on the 190 students. The sample standard deviation is 11.0 mmHg. What is the estimated standard error of the sample mean?

0.08

0.80

1.08

1.80

Solution

HERE SAMPLE STANDARD DEVIATION IS 11.0 mmHg AND SAMPLE SIZE IS 190

THE SAMPLE STANDARD ERROR = SAMPLE STANDARD DEVIATION/SQRT(SAMPLE SIZE)=11/SQRT(190)=0.798=0.80 [APPROX]   [ANSWER]