Exam 2: Graphical and Tabular Descriptive Techniques

Which of the following is true about a stem-and-leaf display?

Consider the following cumulative frequency distribution. Fill in the frequencies for each class in the above table.

The Chief of Police conducted a survey of the officers on his squad. An officer's shooting score at target practice is an example of a(n)____________________ variable.

For which type of data are the values arbitrary numbers?

For what type of data is a histogram appropriate?

A(n)____________________ histogram is one with a long tail extending to either the right or the left.

Briefly discuss the difference between cross-sectional data and time-series data.

The line chart below shows cucumber prices fluctuated from $2.00 per pound to over $4.50 per pound during the year.

According to the stem-and-leaf plot below, this data set has a negative median.

Beef prices throughout the year (month 1 = January)are shown in the line chart below (per pound). Describe beef prices for this given year using this line chart.

A bar chart is used to represent ____________________ data.

A histogram is said to be ____________________ if, when we draw a vertical line down the center of the histogram, the two sides are identical in shape and size.

A(n)____________________ chart is often used to display frequencies; a(n)____________________ chart graphically shows relative frequencies.

We can summarize nominal data in a table that presents the categories and their counts. This table is called a(n)____________________ distribution.

A professor examines the relationship between minutes studying and exam score (out of 200 points)for a random sample of his students. The scatter diagram is shown below. It appears that study time has somewhat of a positive linear relationship with exam score.

The graph below is an example of a histogram.

At the end of a safari, the tour guide asks the vacationers to respond to the questions listed below. For each question, determine whether the possible responses are interval, nominal, or ordinal. a. How many safaris have you taken prior to this one? b. Do you feel that your tour safari lasted sufficiently long (yes\no)? c. Which of the following features of the accommodations did you find most attractive: location, facilities, room size, service, or price? d. What is the maximum number of hours per day that you would like to spend traveling? e. Is your overall rating of this safari: excellent, good, fair, or poor?

In order to draw a scatter diagram, we need interval data for

Twenty-five voters participating in a recent election exit poll in Minnesota were asked to state their political party affiliation. Coding the data as R for Republican, D for Democrat, and I for Independent, the data collected were as follows: I, R, D, I, R, I, I, D, R, I, I, D, R, R, I, D, I, R, I, D, I, D, R, R, and I. Construct a frequency bar chart from this data. What does the bar chart tell you about the political affiliations of those in this sample?

Which of the following statements about shapes of histograms is true?