cutie777
05.08.2019 •
Mathematics
According to insurance records, a car with a certain protection system will be recovered 85% of the time. if 100 stolen cars are randomly selected, what is the mean and standard deviation of the number of cars recovered after being stolen?
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Ответ:
Write 85% as a decimal: 0.85
To find the mean, multiply the sample by the percentage:
Mean = 100 x 0.85 = 85
The standard deviation formula: √n*p*(1-p)
n = sample
p = percentage
Standard deviation = √(100 * 0.85 * (1-0.85)
Standard deviation = 3.57
Ответ:
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Explanation:
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