Ch 2 Quiz

A set of scores ranges from a high of X = 24 to a low of X = 5. If these scores were put in a frequency distribution table with an interval width of 2 points, which of the following would be the top interval in the table?

23-24

For the following frequency distribution of exam scores, how many students had scores lower than X = 80? X 90-94 85-89 80-84 75-79 70-74 f 3 4 5 2 1

3

What kind of frequency distribution graph shows the frequencies as bars that are separated by spaces?

A Bar Graph

After recording the final grade (A, B, C, D, E) for each individual in a class of n = 26 students, the professor would like to display the grade distribution in a frequency distribution graph. What kind of graph should be used? A polygon

A bar graph

If a set of exam scores forms a symmetrical distribution, what can you conclude about the students scores?

About 50% of the students scored above the mean and the rest scored below the mean.

For the following frequency distribution of exam scores, what is the lowest score on the exam? X 90-94 85-89 80-84 75-79 70-74 f 3 4 5 2 1

Can not be determined

The students in a psychology class seemed to think that the midterm exam was very easy. If they are correct, what is the most likely shape for the distribution of exam scores?

Negatively Skewed

If a set of scores is displayed in a frequency distribution bar graph, what scale of measurement was used to measure the scores?

Nominal or Ordinal

In a frequency distribution graph, frequencies are presented on the_____ , and the scores (categories) are listed on the_____.

Y Axis, X Axis

For the following frequency distribution of quiz scores, how many individuals took the quiz? X 5 4 3 2 1 f 6 5 5 3 2 n = 15 n = 5 Cannot be determined n = 21

n = 21