7.1:

What are Estimates?

JoVE 핵심
통계학
JoVE 비디오를 활용하시려면 도서관을 통한 기관 구독이 필요합니다.  전체 비디오를 보시려면 로그인하거나 무료 트라이얼을 시작하세요.
JoVE 핵심 통계학
What are Estimates?

3,499 Views

00:00 min

April 30, 2023

It isn't easy to measure a parameter such as the mean height or the mean weight of a population. So, we draw samples from the population and calculate the mean height or mean weight of the individuals in the sample. This sample data acts as a representative measure of the population parameter. These sample statistics are known as estimates. 

The estimate for the mean of a sample is denoted by ͞x, whereas the mean of the population is designated as μ. Further, parameters such as the mean, proportion, and variance of samples are measured using standard scores, commonly called z scores. Estimates are essential for hypothesis testing, and methods of estimation are used when designing experiments and conducting meta-analyses.