STT (CH 1& (2.1))

When students are asked to list their age and the percentage of their college expenses that they pay for​ themselves, the type of data being collected is quantitative.

• True

• False

It is possible for the same survey questionnaire to yield both quantitative and qualitative data.

• True

• False

When customers return a product to a store and the store asks the customer to indicate the reason that the merchandise was​ returned, the resulting data are quantitative since multiple people will be providing the data.

• True

• False

At the end of the school​ term, students are asked to rate the course and instructor by indicating on a scale of​ 1-5 how well they liked the course. The data generated from this question are examples of quantitative.

• True

• False

For the same​ data, a graph of a relative frequency distribution will look exactly the same as a graph of the frequency distribution.

• True

• False

A histogram can be constructed for data that are either quantitative or qualitative.

• True

• False

Which of the following is a common rule of thumb for determining how many classes to use when developing a frequency distribution with​ classes?

• no fewer than 6 classes

• at least 10 classes

• between 5 and 20 classes

• equal to 0.25 times the number of data values

In forming the classes for a frequency distribution and​ histogram, suppose there were a number of empty classes. What should be​ done?

• keep the current class width

• decrease the class width

• increase the class width

Assuming you have data for a variable with​ 2,000 values, what is the number of groups that should be used in developing a grouped data frequency​ distribution?

• 9

• 11

• 12

• 13

When a histogram is constructed for discrete numerical​ data, there should be spaces between the bars of the histogram.

• True

• False