Based on historical data, your manager believes that 26% of the company's orders come from first-time customers. A random sample of 146 orders will be used to estimate the proportion of first-time-customers. What is the probability that the sample proportion is between 0.28 and 0.46?

According to the Center for Disease Control (CDC), the percentage of boys who are diagnosed with autism by the age of 8 is 2.7%. If 150 boys under the age of 8 are randomly selected, find the probability that the average of them being diagnosed with autism is more than 2.5%.

A film distribution manager calculates that 4% of the films released are flops.If the manager is correct, what is the probability that the proportion of flops in a sample of 747 released films would be less than 3%? Round your answer to four decimal places.

A quality control inspector has drawn a sample of 1515 light bulbs from a recent production lot. Suppose 30%30% of the bulbs in the lot are defective. What is the probability that exactly 1111 bulbs from the sample are defective? Round your answer to four decimal places.

According to a 2009 Reader's Digest article, people throw away about 14% of what they buy at the grocery store. Assume this is the true proportion and you plan to randomly survey 135 grocery shoppers to investigate their behavior. What is the probability that the sample proportion does not exceed 0.19? Answer = (Enter your answer as a number accurate to 4 decimal places.)

An economics professional body estimates that 80% of the students taking undergraduate economics courses are in favour of studying of statistics as part of their studies. If this estimate is correct, what is the probability that more than 790 undergraduate economics students out of a random sample of 1000 will be in favour of studying statistics?

Based on historical data, your manager believes that 27% of the company's orders come from first-time customers. A random sample of 144 orders will be used to estimate the proportion of first-time-customers. What is the probability that the sample proportion is between 0.21 and 0.41? (Enter your answer as a number accurate to 4 decimal places.)

Based on historical data, your manager believes that 25% of the company's orders come from first-time customers. A random sample of 133 orders will be used to estimate the proportion of first-time-customers. What is the probability that the sample proportion is less than 0.32?Answer =  (Enter your answer as a number accurate to 4 decimal places.)

Based on historical data, your manager believes that 34% of the company's orders come from first-time customers. A random sample of 168 orders will be used to estimate the proportion of first-time-customers. What is the probability that the sample proportion is between 0.28 and 0.41? (Enter your answer as a number accurate to 4 decimal places.)

Based on historical data, your manager believes that 29% of the company's orders come from first-time customers. A random sample of 147 orders will be used to estimate the proportion of first-time-customers. What is the probability that the sample proportion is less than 0.33?Answer =  (Enter your answer as a number accurate to 4 decimal places.)