1 Fill in the blank In a bar chart each category is represen

1. Fill in the blank. In a bar chart, each category is represented by a ___. A) table B) bar C) data point D) dot

2. Data that has been collected from part of a population is called A) a statistic. B) a graph. C) a sample. D) a population.

3. Where can you find statistics being reported? A) all of these choices. B) in an advertisement. C) in a newspaper. D) on the television.

4. What types of variables can be displayed by a scatterplot? A) two categorical variables B) only two discrete numerical variables C) one categorical and one numerical variable D) two numerical variables

5. What are two or more bar charts that use the same set of horizontal and v

ertical axes called? A) Stem-and-leaf displays B) Pie charts C) Histograms D) Comparative bar charts

6. Suppose a survey asked 50 students how many days of class they missed per semester. What percentage of students surveyed missed less than 2 days of class a semester? Use the pie chart below to answer the question. A) 55% B) 45% C) 22.5% D) 70%

7. The scores of eight students taking a mathematics test are 87, 93, 76, 15, 84, 90, 95, and 70. The best measure of central tendency in this case is the: A) median B) mean C) box-and whisker D) variance

8. Outliers influence which of the following summary measures? A) standard deviation B) interquartile range C) range D) A and B only E) A and C only

9. According to the empirical rule, the percentage of values that fall outside two standard deviations of the mean is approximately: A) 5% B) 9% C) 7% D) 4%

10.  The mean age of all high school teachers in New York state is 45 years and the standard deviation is 4 years. According to Chebyshev\'s Rule, the percentage of teachers in New York who are 37 to 53 years old is at least: A) 75.00% B) 50.00% C) 70.50% D) 77.00%

11. Which of the following does a box-and-whisker plot not show? A) spread of the data B) percent of the data within two standard deviations of the mean C) center of the data set D) skewness of the data set

Solution

1. B) Bar

2. C) A sample

3. A) all of these choices

4. D) two numerical variables

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