Ch 2.2 Stats

One hundred students are shown an eight-digit number on a piece of cardboard for three seconds and are asked to then recite the number from memory. The process is repeated until student accurately recites the entire number from memory. The following histogram presents the number of trials it took each student to memorize the number.How many students memorized the number in three trials or less?

13

How many values are in the data set whose histogram is shown below ?

22

Given the following frequency distribution, how many pieces of data were less than 28.5? Class Boundaries: 13.5-18.5, 18.5-23.5, 23.5-28.5, 28.5-33.5, 33.5-38.5. Frequencies: 4, 9, 12, 15, 17

25

Which of the following could be a cumulative frequency graph?

A cumulative frequency graph is a ogive graph.

A histogram is a graph that represents the cumulative frequencies for the classes in a frequency distribution.

False

For a given data set, the ogive and the frequency polygon will have the same overall shape.

False

Which of the following is a frequency polygon?

The graph is connected by dots and go up and down .

Which of the following could be an ogive?

The ogive graph goes up.

An ogive is also called a cumulative frequency graph.

True

The frequency polygon and the histogram are two different ways to represent the same data set.

True

The frequency polygon is a graph that displays the data by using lines that connect points plotted for the frequencies at the midpoints of the classes.

True