Question

1. Based on historical data, your manager believes that 30% of the company's orders come from first-time customers. A random sample of 126 orders will be used to estimate the proportion of first-time-customers. What is the probability that the sample proportion is less than 0.31?

Answer =  (Enter your answer as a number accurate to 4 decimal places.)

2. According to a 2009 Reader's Digest article, people throw away about 7% of what they buy at the grocery store. Assume this is the true proportion and you plan to randomly survey 145 grocery shoppers to investigate their behavior. What is the probability that the sample proportion does not exceed 0.15?

Answer =  (Enter your answer as a number accurate to 4 decimal places.)

3. A Food Marketing Institute found that 29% of households spend more than $125 a week on groceries. Assume the population proportion is 0.29 and a simple random sample of 152 households is selected from the population. What is the probability that the sample proportion of households spending more than $125 a week is less than 0.31?

Answer =  (Enter your answer as a number accurate to 4 decimal places.)

Answer 1

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