Chapter 12: Q20. (page 795)
Evaluate the expression.
Short Answer
The value of the expression is 120.
Chapter 12: Q20. (page 795)
Evaluate the expression.
The value of the expression is 120.
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Get started for freeA local cable provider asked its subscribers how many television sets they had in their homes. The results of their survey are shown in the probability distribution.
Number of televisions | probability |
1 | 0.18 |
2 | 0.36 |
3 | 0.34 |
4 | 0.08 |
0.04 |
Show that the distribution is valid.
Write each fraction as a percent. Round to the nearest tenth.
SALES Nate is keeping track of how much people spent at the school bookstore in one day. Find the mean absolute deviation for the data to the nearest tenth:
Find the mean, variance, and standard deviation to the nearest tenth for the set of data.
10, 11, 10, 11, 12
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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