Exam 2: Picturing Variation With Graphs

For twenty days a record store owner counts the number of customers who purchase an album by a certain artist. The data and a dotplot of the data are shown below: Data set: 1, 3, 4, 4, 5, 6, 7, 2, 3, 4, 4, 5, 6, 8, 2, 3, 4, 5, 6, 7, 9 Which of the following statements can be made using the given information?

The histogram shows the distribution of pitch speeds for a sample of 75 pitches for a college pitcher during one season. Which of the following statements best describes the distribution of the Histogram below?

A collection of twenty college students was asked how much cash they currently had in their possession. The data is summarized in the stemplot below. Typically, how much money does a student have in his or her possession? 0 5 1 0 2 2 2 2 3 0 0 3 3 9 4 0 0 0 2 3 5 6 6 5 1 6 7

A collection of twenty college students was asked how much cash they currently had in their possession. The data is summarized in the stemplot below. How many students had between forty and fifty dollars in their possession? 0 5 1 0 2 2 2 2 3 0 0 3 3 9 4 0 0 0 2 3 5 6 6 5 1 6 7

A used car salesman decides to track the number of cars he sold each week for the past twelve months. Typically, the salesman sells 13 cars per week. During an usually slow week he sold only 2 cars, but during his best week he sold 29 cars. Predict the shape of the histogram of the number of cars sold each week.

The histograms below show the distribution of the amount of time per week spent outside of school on extracurricular athletic activities for high school boys and high school girls. Use the histograms to answer the question. -Which group is more likely to spend 8 hours or more on extracurricular athletic activities each week? Which group is more likely to spend 6 hours or less on extracurricular athleticr activities each week?

The bar chart below shows car color for college students at a local community college. Use the bar chart to answer the question. -Did one group (males or females) show more variability in car color?

The following graphic was used to visually summarize the following statement made by Incredi-gro Fertilizer Company in a recent newspaper advertisement: "Our new Incredi-groFertilizer for flowers will grow your flowers two times faster than water alone."

The histogram below shows the distribution of pass rates on a swimming test of all children who completed a four week summer swim course at the local YMCA. Use the histogram to answer the question. -About how many of the swim courses had a pass rate of 70% or better? The YMCA managers have set a goal for the summer that at least half the swim courses have a pass rate of at least 70%. Do you think that this YMCA is running a successful summer swim program? Why?

The distribution of test scores for a group of adults on a written driving exam following a refresher course tends to be left-skewed.

Which of the following statements about bar graphs is true?

Which of the following statements about bar graphs is true?

The histograms below show the distribution of the amount of time per week spent outside of school on extracurricular athletic activities for high school boys and high school girls. Use the histograms to answer the question. -About what percent of girls spent 5 hours or less on extracurricular athletic activities each week? Round to the nearest whole percent.

The histograms below show the distribution of the amount of time per week spent outside of school on extracurricular athletic activities for high school boys and high school girls. Use the histograms to answer the question. -Compare and describe the shape of the distributions.

The dotplot shows how many times a computer was used daily at a public library during a 30-day period. Use information from the dotplot to answer the question. -The library does not want patrons to wait in line. Usually, a line develops when a computer is used more than 40 times in a day. What percent of days did this occur? Round to the nearest whole percent.

The histogram below is the distribution of heights for a randomly selected Boy Scout troupe. Choose the statement that is true based on information from the histogram.

The following side-by-side bar graph shows the level of post-secondary education achieved ten years after high school for graduates from the years 1999 and 2001. Use the bar graph to answer the question. -What is the mode response for 2001?

Choose the histogram that matches the description. -The histogram below shows the distribution of pass rates on a swimming test of all children who completed a four week summer swim course at the local YMCA. What is the typical pass rate for the swim test?

Define the important features to look for when presented with a numerical distribution.

Choose the histogram that matches the description. -The histogram below shows the distribution of pass rates on a swimming test of all children who completed a four week summer swim course at the local YMCA. How many of the courses had Pass rate less than 40 percent?