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The number of passengers passing through a large South East Asian airport is normally distributed with a mean of 110,000 persons per day and a standard deviation of 20,200 persons (You need to show all your calculations and demonstrate how you obtain your results)
If you select a random sample of 16 days:
(a) What is the sampling distribution of the mean? You should give a brief explanation of your answer.
(b) What is the probability that the sample mean is less than 98,000 passengers?
(c) What is the probability that the sample mean is between 102,000 and 104,500 passengers?
The owner of a restaurant serving Continental-style entrees has the business objective of learning more about patterns of patron demand for the Friday to Sunday weekend time period.
PLEASE EXPLAIN not just answers What is the expected value of sum of the points if you roll a die twice? Why?
Using your experience from previous or current employment, provide a business example where you could use a t-test to assist in a business decision. State the null and alternative hypothesis.
12 of the top 20 finishers in the 2009 pga tour used a titleist brand gold ball. suppose there results are
Use normal approximation to the binomial distribution to determine the answer if this probability cannot be determined explain why.
An auditor for Health Maintenance Services of Georgia reports 40% of policyholders 55 years or older submit a claim during the year. Fifteen policyholders are randomly selected for company records.
Research shows that 14.3% of persons 20-25 years old and 59.9 % of persons 60-65 years old vote. What is the absolute increase from the younger group to the older group to the nearest point?
However, administrators concerned about cost argued that with only 200,000 trials, the probability of waking up using the new method could not be accurately estimated. Verify that a 0.95 confidence interval for p, the probability of waking up, is ..
Consider a binomial distribution with 15 identical trials, and a probability of success of 0.5. Use the normal approximation to find the probability that x = 2.
Test the hypothesis that her students watch more TV than the average American child in the population using a .05 level of significance.
Distinguish between a hypergeometric and a binomial random variable.- A 95% confidence interval for the mean thickness of a part in millimeters is (10.2, 12.9). Interpret this interval.
a. State the null and alternative hypotheses for a contingency table test for independence of gender.
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