The typical beginning income for a data analyst is $40,000, with a standard variation of 5,000 dollars in earnings. A random sample of 50 people is selected from the general population. Figure out what the probability is that the sample mean is less than 30,000.
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The typical beginning income for a data analyst is $40,000, with a standard variation of 5,000 dollars in earnings. A random sample of 50 people is selected from the general population. Figure out what the
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- A research company surveyed 1024 people who routinely fly for business travel purposes and found that 384 of them were generally satisfied with the flights they took. Find the standard error for the sample proportion of people who routinely fly for business travel purposes and are generally satisfied with the flights they take. Enter your answer as a decimal rounded to three 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.)For example, let us assume that the mean quantity of cholesterol in eggs is 185 milligrams with a standard variation of 8 milligrams. Calculate the probability that the mean amount of cholesterol in a sample of 44 eggs will be within 3 milligrams of the mean amount of cholesterol in the general population.
- Suppose that insurance companies did a survey. They randomly surveyed 400 drivers and found that 310 claimed they always buckle up. We are interested in the population proportion of drivers who claim they always buckle up. Which distribution should you use for this problem? (Round your answer to four decimal places.)For the sample scores in the frequency distribution table below, the median is 1 4 4. 1 1 1 3.One year, the distribution of salaries for professional sports players had mean $1.6 million and standard deviation $0.81 million. Suppose a sample of 100 major league players was taken. Find the approximate probability that the average salary of the 100 players that year exceeded $1.7 million. Round your answer to nearest ten-thousandth.
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