Exam 2: Presenting Data in Tables and Charts

TABLE 2-6 A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following table contains the result. $$ Did Well in Midterm Did Poorly in Midterm Studying for Exam 80 20 Went Bar Hopping 30 70 -Referring to Table 2-6,_____ percent of the students in the sample went bar hopping the weekend before the midterm and did well on the midterm.

TABLE 2-15 The figure below is the ogive for the amount of fat (in grams) for a sample of 36 pizzas products where the upper boundaries of the intervals are: 5, 10, 15, 20, 25, and 30. -Referring to Table 2-15, what percentage of pizza products contains between 10 and 25 grams of fat?

TABLE 2-12 The table below contains the opinions of a sample of 200 people broken down by gender about the latest congressional plan to eliminate anti-trust exemptions for professional baseball. For Neutral Against Totals Female 38 54 12 104 Male 12 36 48 96 Totals 50 90 60 200 -Referring to Table 2-12, if the sample is a good representation of the population, we can expect ____percent of those for the plan in the population will be males.

$\text { TABLE 2-4 }$ A survey was conducted to determine how people rated the quality of programming available on television. Respondents were asked to rate the overall quality from 0 (no quality at all) to 100 (extremely good quality). The stem-and-leaf display of the data is shown below. Stem Leaves 3 24 4 03478999 5 0112345 6 12566 7 01 8 9 2 -Referring to Table 2-4, what percentage of the respondents rated overall television quality with a rating of 50 or below?

$\text { TABLE 2-14 }$ The table below contains the number of people who own a portable DVD player in a sample of 600 broken down by gender. Own a Portable DVD Player Male Female Yes 96 40 No 224 240 -Referring to Table 2-14, construct a table of column percentages.

$\text { TABLE 2-8 }$ The Stem-and-Leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility. Stem Leaves 0 012222233333344566666667789999 1 1111222234444455669999 2 00011223455556889 3 0000446799 4 011345567 5 0077 6 8 7 67 8 3 9 0247 -Referring to Table 2-8, if a frequency distribution with equal sized classes was made from this data, and the first class was "0 but less than 10," the class midpoint of the third class would be ______.

$\text { TABLE 2-11 }$ The ordered array below resulted from taking a sample of 25 batches of 500 computer chips and determining how many in each batch were defective. $\text {Defects}$ 1 2 4 4 5 5 6 7 9 9 12 12 15 17 20 21 23 23 25 26 27 27 28 29 29 -Referring to Table 2- 11, construct a cumulative percentage polygon for the defects data if the corresponding frequency distribution uses "0 but less than 5" as the first class.

TABLE 2-9 The frequency distribution below represents the rents of 250 randomly selected federally subsidized apartments in Minneapolis. Rent in \ Frequency 300 but lessthan 400 113 400 but lessthan 500 85 500 but less than 600 32 600 but lessthan 700 16 700 but lessthan 800 4 -Referring to Table 2-9, the class midpoint of the second class is______ .

TABLE 2- 5 The following are the durations in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier. Relative Time (in Minutes) Frequency 0 but lessthan 5 0.37 5 but less than 10 0.22 10 but lessthan 15 0.15 15 but less than 20 0.10 20 but lessthan 25 0.07 25 but lessthan 30 0.07 30 or more 0.02 -Referring to Table 2-5, what is the width of each class?

TABLE 2-14 The table below contains the number of people who own a portable DVD player in a sample of 600 broken down by gender. Own a Portable DVD Player Male Female Yes 96 40 No 224 240 -Referring to Table 2-14, of the males in the sample, ____percent owned a portableDVD.

TABLE 2-14 The table below contains the number of people who own a portable DVD player in a sample of 600 broken down by gender. Own a Portable DVD Player Male Female Yes 96 40 No 224 240 -Referring to Table 2-14, of the females in the sample,_____ percent owned a portable DVD.

In general, grouped frequency distributions should have between 5 and 15 class intervals.

Histograms are used for numerical data while bar charts are suitable for categorical data.

In graphing bivariate categorical data, the side-by-side bar chart is best suited when primary interest is in demonstrating differences in magnitude rather than differences in percentages.

TABLE 2-14 The table below contains the number of people who own a portable DVD player in a sample of 600 broken down by gender. Own a Portable DVD Player Male Female Yes 96 40 No 224 240 -Referring to Table 2-14, of those who did not own a portable DVD in the sample,__________ percent were males.

The original data values cannot be assessed once they are grouped into a frequency distribution table.

The larger the number of observations in a numerical data set, the larger the number of class intervals needed for a grouped frequency distribution.

TABLE 2-12 The table below contains the opinions of a sample of 200 people broken down by gender about the latest congressional plan to eliminate anti-trust exemptions for professional baseball. For Neutral Against Totals Female 38 54 12 104 Male 12 36 48 96 Totals 50 90 60 200 -Referring to Table 2-12, if the sample is a good representation of the population, we can expect________ percent of the population will be for the plant.

You have collected information on the consumption by the 15 largest coffee-consuming nations. Which of the following is the best for presenting the share of the consumption?

In order to compare one large batch of numerical data to another, a(n) _______distribution must be developed from the frequency distribution.