Exam 3: Graphical Descriptive Techniques II

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

The histogram below has a shape that is ____________________.

A histogram represents interval data.

A(n)____________________ is best defined as a set of symbols (such as people or animals)used to depict data.It often distorts the actual sizes of the items being portrayed.

A(n)____________________ is a graphical display consisting of a set of points,each point representing one variable measured along the horizontal axis,and another variable measured along the vertical axis.

Electronics Company At a meeting of regional offices managers of a national electronics company,a survey was taken to determine the number of employees the regional managers supervise in the operation of their departments.The results of the survey are shown below. Number of emplayees supervised 1 2 3 4 5 Frequency 7 11 14 10 -{Electronics Company Narrative} What is the cumulative relative frequency corresponding to 4 employees?

A pie chart uses relative frequencies to summarize the data so including the sample size is not important.

When one variable increases and the other decreases,we say that there is a(n)____________________ relationship between these two variables.

In a histogram a(n)____________________ class is the one with the largest number of observations.

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.

Which of the following statements is true?

For what type of data is a histogram appropriate?

The sum of the relative frequencies for all classes in a histogram always equals

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 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.

The largest value of a cumulative relative frequency is ____________________.

Differences in the frequencies of a histogram appear to be less dramatic if you ____________________ the vertical axis.

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 -{Test Grades Narrative} Construct a stem-and-leaf display for this data set.Describe the shape of the data.

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 -{Insurance Company Narrative} How many homeowners are represented in the sample?

The more observations we have,the ____________________ the number of class intervals we need to use to draw a useful histogram.