Читать книгу Interpreting and Using Statistics in Psychological Research - Andrew N. Christopher - Страница 30

1 Explain the difference between a parameter and a statistic.A: A parameter is a population value, whereas a statistic is a sample value.

2 Explain the difference between descriptive statistics and inferential statistics.A: Descriptive statistics organize and summarize information about a sample. They are the first step toward using inferential statistics, which are procedures used to learn whether we can make conclusions about a population based on data from a sample.

3 Why is it the case that in almost any research study, there will be some degree of sampling error?A: Unless everyone in the population is included in the sample, there will be some discrepancy between the population characteristics and the sample characteristics.