The grades an the second statistics test for Mrs. Sweeney's class are in the following list. Find the frequency distribution for the grades. \[ \text { C, F, A, C, C, B, C, C, B, F, C, C, F , D, D, C, F, D, F, B, D } \]

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

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

The distribution of heights of 19 -year-old women is approximately normal, with a mean of 170 cm and a standard deviation of 5 cm . a What percentage of these women have heights: i between 155 and 185 cm ? ii greater than 180 cm ? iii between 160 and 175 cm ? b In a sample of 5000 of these women, approximately how many have heights greater than 175 cm ?

Classifying subjects on the basis of gender is an example of what kind of measurement scale? nominal. ordinal. interval. discrete. continuous.

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