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Statistics

1. In a Gallup poll of 1,038 adults, 540 said that second-hand smoke is very harmful. What is the percentage of adults who said second-hand smoke is very harmful?

2. The first class in a relative frequency table is 50-59 and the corresponding relative frequency is 0.2. What does the 0.2 value indicate?

3. When you add the values 3, 5, 8, 12, and 20 and then divide by the number of values, the result is 9.6. Which term best describes this value: average, mean, median, mode, or standard deviation?

4. What is the range of the values 2.0, 3.7, 4.9, 5.0, 5.7, 6.7, 8.5, and 9.0?

What is the median?

What is the mean?

What is the mode?

Solution Preview

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1.       In a Gallup poll of 1,038 adults, 540 said that second-hand smoke is very harmful. What is the percentage of adults who said second-hand smoke is very harmful?

percentage = 540/1038 x 100 = 0.520231 x 100 = 52.02%

Answer: 52.02% of adults said second-hand smoke is very harmful.

2.       The first class in a relative frequency table is 50â?"59 and the corresponding relative ...

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