Chapter 2 Review

A homeowners association consists of 20 homes. The family in each home is considered an automatic member of the association. Recently, one of the homes fell into a state of disrepair. A survey was conducted of the homeowners both on the same street as the house in question and on the second street. At issue was whether legal action should be brought against the homeowner with the problem house. There are 8 homes on the same street as the problem house and 6 of these called for legal action. The percentage of houses on the second street that favored legal action is 50 percent. Which type of chart might be most effective for conveying the information about percentage of residents favoring legal action by street? A) Bar chart B) Histogram C) Stem and leaf diagram D) Pie chart

A) Bar chart

Which of the following is not considered desirable when constructing a frequency distribution for continuous data? A) Open-ended classes B) All-inclusive classes C) Mutually exclusive classes D) Equal-width classes

A) Open-ended classes

In forming the classes for a frequency distribution and histogram, suppose there were a number of empty classes. You should: A) decrease the class width. B) keep the current class width. C) use an ogive instead. D) increase the class width.

A) decrease the class width.

When using Excel's Histogram option under the Data Analysis tool, the term bins refers to: A) the upper limits of each class. B) the lower limits of each class. C) the column where the data are located. D) the mid-point of each class.

A) the upper limits of each class.

Many Walmart stores have automotive departments where customers can buy tires, have their vehicles serviced, and obtain other automotive services. Recently, the manager at an Ohio Walmart collected data on the time customers had to wait to get the desired automotive service. Of the 500 cars in the sample, the shortest time any customer spent waiting was 3 minutes and the longest time was 183 minutes. Assuming that the manager wishes to develop a frequency distribution with 9 classes, which of the following would be an appropriate class width for each class? A) 19.99 B) 20.00 C) 10.50 D) 3 to 23

B) 20.00

A common rule of thumb for determining how many classes to use when developing a frequency distribution with classes is: A) at least 10 classes. B) between 5 and 20 classes. C) equal to 0.25 times the number of data values. D) no fewer than 6 classes.

B)between 5 and 20 classes.

A histogram is most commonly used to analyze which of the following? A) Time-series data B) Ordinal data C) Quantitative data D) Nominal level data

C)Quantitative data

A histogram is used to display which of the following characteristics for a quantitative variable? A) The spread in the data B) The approximate center of the data C) The shape of the distribution D) All of the above.

D) All of the above.