Exam 2: Describing Data: Frequency Distributions and Graphic Presentation

The following class intervals for a frequency distribution were developed to provide information regarding the starting salaries for students graduating from a particular school: Before data was collected, someone questioned the validity of this arrangement. Which of the following represents a problem with this set of intervals?

What is the relative class frequency for the $25 up to $35 class?

Refer to the following distribution of commissions: -What are the class limits for the class with the smallest number of frequencies?

When classes in a frequency table are constructed so that data will fit into only one category, it is called__________ .

The head of the statistics department wants to determine the number of mistake made by students in their first online assignment. She gathers information from her classes of the past year. The approximate range of the data is______ .

Monthly commissions of first-year insurance brokers are $1,270, $1,310, $1,680, $1,380, $1,410, $1,570, $1,180 and $1,420. These figures are referred to as:

A student was interested in the cigarette smoking habits of college students and collected data from an unbiased random sample of students. The data is summarized in the following table: Why is the table NOT a frequency table?

Two advantages of a stem-and-leaf chart over a histogram are that the is not lost, and that it presents ______________.

(i) A frequency table is a grouping of qualitative data into mutually exclusive classes showing the number of observations in each class. (ii) Simple bar charts may be constructed either horizontally or vertically. (iii) A bar chart is a graphic representation of a frequency table.

(i) Bar charts are useful for showing the percent that various components compose of the total. (ii) Simple bar charts may be constructed either horizontally or vertically. (iii) A bar chart is a graphic representation of a frequency table.

Refer to the following ages (rounded to the nearest whole year) of employees at a large company that were grouped into a distribution with class limits: 20 up to 30 30 up to 40 40 up to 50 50 up to 60 60 up to 70. -IQs were tested for a number of students. The first three IQs are 105, 115, and 125. The lower limit for the third class is_______ .

Refer to the following ages (rounded to the nearest whole year) of employees at a large company that were grouped into a distribution with class limits: 20 up to 30 30 up to 40 40 up to 50 50 up to 60 60 up to 70. -IQs were tested for a number of students. The first three IQs are 105, 115, and 125. The true class limits for the fourth class are_____ and__________ .

The grades on a statistics exam for a sample of students are as follows: How many students wrote this test?

When data is collected using a qualitative, nominal variable, i.e., male or female, what is true about a frequency distribution that summarizes the data?

Using the frequency table below, determine the relative frequencies for Apartment and Townhouse listings.

Refer to the following cumulative frequency distribution on days absent during a calendar year by employees of a manufacturing company: -How many employees were absent between 3 to under 6 days?

A table showing the number of observations that have been grouped into each of several classes is called a(n)___________ .

Refer to the following chart showing a distribution of exporting firms: -How many firms export less than $14 million in product?

The relative frequency for a class is computed as

(i) Pie charts are useful for showing the percent that various components compose of the total. (ii) Simple bar charts may be constructed either horizontally or vertically. (iii) A bar chart is a graphic representation of a frequency table.