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Probability that the percentage of these people who recycle

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1. The amount of time that people spend in a grocery aisle follows a right-skewed distribution with a mean of 2.4 minute and standard deviation of 30 seconds. If 100 people are randomly selected, what is the probability the average time they spend in a grocery aisle is less than 2.5 minutes?

2. The number of hours per week that people watch TV is normally distributed with a mean of 15.8 hours and standard deviation of 3.3 hours. If a focus group of 8 people is held, what is the probability the amount amount of TV per week they watch is more than 17 hours?

3. The percentage of people who recycle is 25% on average. A sample of 80 people is taken. What is the probability that the percentage of these people who recycle is more than 20%?

Reference no: EM131538032

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