Exam 2: Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

When a class interval is expressed as: 100 up to 200,

If the number of observations is 124, calculate the suggested number of classes using the "2 to the k rule" _______________________.

Refer to the following frequency distribution on days absent during a calendar year by employees of a manufacturing company: How many employees were absent fewer than six days?

In frequency distributions, classes are mutually exclusive if each individual, object, or measurement is included in only one category.

What is the difference between a frequency distribution and a cumulative frequency distribution?

To summarize the gender of students attending a college in a frequency distribution, how many classes would be required? ________________

In a relative frequency distribution, the sum of the relative class frequencies is ______________________.

To construct a bar chart, the class frequencies are plotted on the _________________

A data set consists of 40 observations. For a quantitative variable, how many classes would you recommend for the frequency distribution? _______

The following frequency distribution shows the distribution of delivery times (in days) for swimstuff.com customer orders during the last month. For 300 observations, our rule-of-thumb for number of classes would indicate 9 classes. In this case what is the class interval and why would it be reasonable to use that class interval and only 6 classes?

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:

The following frequency distribution shows the distribution of delivery times (in days) for swimstuff.com customer orders during the last month. What is the relative frequency for orders delivered in three days or more?

Refer to the following distribution of commissions: For the distribution above, what is the midpoint of the class with the greatest frequency?

A frequency distribution for qualitative data has class limits.

Refer to the following breakdown of responses to a survey of "Are you concerned about being tracked while connected to the Internet"? What type of chart should be used to describe the frequency table?

Refer to the following breakdown of responses to a survey of room cleanliness in a hotel. Draw a bar graph that illustrates the relative frequencies.

Refer to the following distribution of commissions: The first coordinate for a cumulative frequency distribution would be:

Refer to the following breakdown of responses to a survey of room service in a hotel. What is the class interval for the frequency table above?

Refer to the following class marks or midpoints for a frequency distribution of "weights of college men" recorded to the nearest pound: The first three class marks are 105, 115, and 125. What is the upper limit for the third class? _______

A cumulative frequency distribution is used when we want to determine how many observations lie above or below certain values.