A random sample of 10 monthly sales figures at a small busin…
A random sample of 10 monthly sales figures at a small business had a sample mean of $15,000 and a sample standard deviation of $1,200. Calculate the margin of error for a 95% confidence interval, assuming a normally distributed population.
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Assume that the probability of a flight departure being on time at Minneapolis-St. Paul Airport follows a binomial distribution, where each flight has a 75% chance of being on time. A random sample of 25 flights is considered. What is the probability that at least 15 flights are on time but no more than 22 flights are on time?
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