Exam 3: Graphical Descriptive Techniques II

NARRBEGIN: TeachersAges Teachers Ages The ages (in years) of a sample of 25 teachers are as follows: 47 21 37 53 28 40 30 32 34 26 34 24 24 35 45 38 35 28 43 45 30 45 31 41 56 NARREND -{Teachers Ages Narrative} Draw a frequency histogram of this data which contains six classes. What is the shape of the histogram?

NARRBEGIN: Home Care Home Care Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND -The graphical technique used to describe the relationship between two interval variables is the scatter diagram.

NARRBEGIN: Home Care Home Care Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND -The relative frequency of a class in a histogram is computed by

NARRBEGIN: Home Care Home Care Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND -How do you determine whether two interval variables have a positive linear relationship?

NARRBEGIN: Home Care Home Care Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND -Which of the following describes an ogive?

NARRBEGIN: Test scores Test scores The scores on a calculus test for a random sample of 40 students are as follows: 63 74 42 65 51 54 36 56 68 57 62 64 76 67 79 61 81 77 59 38 84 68 71 94 71 86 69 75 91 55 48 82 83 54 79 62 68 58 41 47 NARREND -{Test Grade Narrative} Construct a relative frequency histogram for this data set and discuss its shape.

NARRBEGIN: Home Care Home Care Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND -The length of each line in a step-and-leaf display represents the ____________________ of that class interval defined by the stems.

NARRBEGIN: Home Care Home Care Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND -The two most important characteristics revealed by the scatter diagram are the strength and direction of the linear relationship.

NARRBEGIN: Home Care Home Care Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND -Which of the following statements about histograms is false?

NARRBEGIN: Home Care Home Care Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND -When two variables tend to move in opposite directions, yet still form a linear pattern, how do you describe their relationship?

NARRBEGIN: Home Care Home Care Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND -Which of the following statements describes a line chart?

NARRBEGIN: Test scores Test scores The scores on a calculus test for a random sample of 40 students are as follows: 63 74 42 65 51 54 36 56 68 57 62 64 76 67 79 61 81 77 59 38 84 68 71 94 71 86 69 75 91 55 48 82 83 54 79 62 68 58 41 47 NARREND -{Test Grades Narrative} Construct frequency and relative frequency distributions for this data set using seven class intervals. Describe the shape of the data set.

NARRBEGIN: Internet Classes Internet Classes A survey of 25 students was conducted to determine how they rate the quality of Internet classes. Students 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 15 4 01457889 5 0134677 6 24568 7 29 8 9 5 NARREND -{Internet Classes Narrative} What percentage of the students rated the overall quality of Internet classes as being 60 or below?

NARRBEGIN: Home Care Home Care Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND -A(n) ____________________ display shows the actual observations as well as the number of observations in each class.

NARRBEGIN: Home Care Home Care Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND -A line chart is created by plotting the value of the variable on the ____________________ axis and the time periods on the ____________________ axis.

NARRBEGIN: Home Care Home Care Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND -It is typical that when taking an exam, few students hand in their exams early; most prefer to reread their papers and hand them in near the end of the scheduled exam period. Under this scenario, a histogram of exam taking times is ____________________ skewed.

NARRBEGIN: Home Care Home Care Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND -The original observations cannot be determined once they are grouped into a frequency distribution.

NARRBEGIN: Home Care Home Care Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND -The graph below is an example of a histogram.

NARRBEGIN: Home Care Home Care Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND -A histogram represents interval data.

NARRBEGIN: Insurance Company Insurance Company A representative from a local insurance agency selected a random sample of insured homeowners and recorded the number of claims made in the last three years, with the following results: Number of claims 0 1 2 3 4 5 Frequency 9 20 14 13 5 3 NARREND -{Insurance Company Narrative} What number of claims was made by the highest proportion of homeowners?