Exam 2: Summarizing Data: Frequency Distributions in Tables and Graphs

A researcher measures the time (in seconds)it takes children to complete a basic reading skills task.What type of graphical display would be most appropriate for summarizing the frequency of children falling into different intervals of time?

The data should be grouped for the following data set: 0,0,0,2,2,1,1,2,2,2,1,0,0,0,0,2,2,1,1,1,2,1,2,2,0,0,1,and 2.

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

Which of the following requires the calculation of a real range?

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

The corresponding percentile of a given percentile point is the percentile rank of that score.

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

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

The three steps for constructing a simple frequency distribution are

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

What is the percentile point at the 90th percentile in the following distribution?

When cumulating frequencies from the bottom up,the data are discussed in terms of

Fill in the missing values for A and B in this frequency distribution table:

State the type of graphical display for Graph A and GraphB.

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.

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

The following is a simple frequency distribution table.Suppose we convert this table to a cumulative frequency distribution.The frequencies in each interval of the cumulative frequency distribution would be

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 student scores in the 80th percentile on an exam.What does this mean in comparison to all other students?

To summarize relative percent data,a pie chart can be a good choice to display the data.