Statistics and Hypothesis Testing

Summary of Main Points
◮ We will never know population parameters µ Y or σY 2 , but we
will use data from samples to compute estimates Y and sY
2
and statistical theory to judge the quality of the estimates
for addressing real-world questions.
◮ Statistical knowledge is couched around hypothesis testing:
will the sample data permit us to accept a maintained
hypothesis or to reject it in favor of an alternative
◮ We will use the sample mean to test hypotheses about the
population mean. What are some conequences of the focus on
the mean