Modified True-False
Determine whether each of the following statements is a true statement or a false
statement. If it is false, change the underlined word to make it true. (2 points each)
________1. The relative frequency for a particular category is the number of times the
category appears in the data.
False-normal frequency
________2. Bar charts and pie charts are graphical methods that are often used in
summarizing categorical data.
True
________3. Dotplots and stem-and-leaf plots work best for small numerical data sets.
True
________4. Numerical Variables are also known as qualitative values.
False-quantitative
________5. The number of speeding tickets each student in AP Statistics has received is a
numerical variable.
True
________6. The three types of central tendencies are Mean, Median, and Variance.
False-Mean, Median, and Mode
________7. If the upper tail of the histogram is shorter than the lower tail of the histogram,
then the histogram is said to be skewed right.
False-left
________8. A histogram with two peaks is said to be bimodal.
True
________9. The serial number of an IPOD is a numerical variable.
False-categorical
________10. An observational study can result in data that provides evidence for a cause-
and-effect relationship.
False-experiment
________11. A data set is continuous if the values are isolated points on the number line.
False-discrete
________12. Statistical methods, used appropriately, allow us to draw conclusions based
on data.
True
________13. The ONLY way to show cause & effect is with a well-designed, well-controlled
observation.
False-experiment
________14. The population mean is denoted by .
False-
________15. The population mean is the average of al x values in the entire population.
True
________16. The median is nonresistant to the outliers in a data set.
