The grades on the second statistics test for Mr. Brown's class are in the following list. Find the frequency distribution for the grades. \[ \text { Answer } \] Grade C frequency

For an experiment comparing more than two treatment conditions or more than two groups, you should use analysis of variance (ANOVA), rather than separate \( t \) tests. True False

Which of the following is/are part of descriptive statistics? central tendency. variability. linear regression. correlation. all of the above.

A significant result is one that has a low probability of occurring by chance (i.e. sampling error). False

Cite as características que um bom diagrama de dispersão deve ter para facilitar a interpretação dos dados.

F-tests and t-tests are usually used to determine whether the experimental groups are significantly different from each other at a certain alpha level. True False