STAT 245 Lecture Notes - Lecture 7: Simple Random Sample
Document Summary
Stat 245 lecture 3 describing data with numerical measures. Sample mean, = = 1+ 2+ 3+ + Note: sometimes, we just simplify the notation . We are given the heights in inches of a simple random sample of 25 women: The sample mean height of the 25 women is. Note: the first step in determining the median is to rearrange the data in ascending order, i. e. from smallest to largest. The median is the middle-most value when the data values are arranged in ascending order. Note: the above formula is not for the value of the median. It is for the position of the median. Let us consider the heights in inches of the 25 women in the previous example. To find the median, the first step is to rearrange the data in ascending order, i. e. from smallest to largest. And the value at the 13th position, i. e. the median is = 63. 9 inches.
