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Chapter 12: Q34. (page 796)
The results of a simulation of coin flipping are shown.
Outcome | Frequency |
heads | 25 |
tails | 75 |
What is the experimental probability of tails?
The experimental probability is 0.75.
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Find each product.
Find the mean absolute deviation to the nearest tenth.
A fast food company polled a random sample of its customers to find how many times a month they eat out: 10, 3, 12, 15, 7, 8, 4, 12, 9, 14, 12. Find the mean absolute deviation of the data set to the nearest tenth.
Write an expression that describes the area in square units of a triangle with a height of and a base of .
Write each fraction as a percent. Round to the nearest tenth.
To predict whether or not an issue on a ballot will pass or fail, a committee randomly calls 250 houses with area codes that are inside the voting district and asks the opinions of registered voters. Based on these efforts, the committee determines that of the voting population supports the issue. The committee concludes that the issue will pass.
a. Identify the sample.
b. Describe the population.
c. What method of data collection did the committee use: survey, experiment, or observational survey? Explain.
d. Is the sample biased or unbiased. Explain.
e. If unbiased, classify the same as simple, stratified, or systematic. Explain.
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