Exam 2: Summarizing Data: Frequency Distributions in

A cumulative percentage summary that indicates the percentage of scores at or below a given value is called a

The range of scores in each interval of a grouped frequency distribution is called the

A psychologist wants to know how many of her clients continue with therapy for at least 12 days.If she constructs a frequency distribution for these data,what type of distribution would be most appropriate to answer her question?

A frequency polygon,but not an ogive can be used to summarize cumulative percent distributions.

The following frequency distribution is an example of

A graphical display for grouped frequency distributions with continuous data is called a

A percentile point is

An open class is permitted when outliers exist in the data.

Summarizing data in a table or graph can make it easier to see patterns in the data.

State the problem with this simple frequency distribution.

A researcher distributes frequencies into the following intervals: 1-10,11-20,21-30,31-40,41-50,and 51 and above.What is wrong with this frequency distribution?

A simple frequency distribution

Twelve percent of students scored at or below a failing grade on an exam.A percentile rank distribution would be appropriate to summarize this outcome.

The real range is the difference between the largest value and smallest value in a data set.

Which of the following is a type of graphical display used to summarize quantitative,continuous data?

A ________ is plotted at the midpoint of each interval,whereas a ________ is plotted at the upper boundary of each interval.

The midpoint of a given interval is the average of the upper and lower boundaries for that interval.

A percentile rank is a cumulative percentage distribution summed from the bottom up.

As a general rule,a simple frequency distribution should have between

To determine the interval width,we divide the ________ by the number of intervals.