Business Statistics
Question 1
Seventy percent of the students applying to a university are accepted. Using the binomial probability tables or Excel, what is the probability that among the next 18 applicants:
- At least 6 will be accepted?
- Exactly 10 will be accepted?
- Exactly 5 will be rejected?
- Fifteen or more will be accepted?
- Determine the expected number of acceptances.
- Compute the standard deviation.
Question 2
Scores on a recent national statistics exam were normally distributed with a mean of 80 and a standard deviation of 6.
- What is the probability that a randomly selected exam will have a score of at least 71?
- What percentage of exams will have scores between 89 and 92?
- If the top 2.5% of test scores receive merit awards, what is the lowest score eligible for an award?
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