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Suppose small aircraft arrive at a certain airport according to a Poisson process with per hour, so that the number of arrivals during a time period of t hours is a Poisson random variable with parameter .
a) What is the probability that exactly 6 small aircraft arrive during a 1-hour period? At least 6?
b) What are the expected value and standard deviation of the number of small aircraft that arrive during a 90-min period?
For monthly volume of 300 tables, find out total cost, total revenue, and profit.
You are running a chi-squared test. You have 2 groups with 3 characteristics each, what would your critical value be with an alpha of .025?
Do the association between the sizes of the heads and bodies of the two species appear to be strong? Explain.
Find the probability that their mean energy consumption level for September is greater than 1075 kWh.
In 1990, the population of Austin, Texas, was 494,290. During the next 10 years, the population increased by about 3% each year.
Four percent of DVD players manufactured by an electronics company are defective. Suppose six DVD players are randomly selected from the production line. Each DVD player is determined to be defective or non-defective.
Assume the population proportion is 0.17 and a simple random sample of 850 households will be selected from the population. What is the probability that the sample proportion will be within ±0.02 of the population proportion?
Three scholarships are available for students. Their values are: $2,000, $2,400, $3,000. Twelve students have applied and no student may receive more than one scholarship. Assume all twelve students are in needs of the funds, how many different..
What is the difference between a null hypothesis and an alternate hypothesis? Explain what is meant by the critical value of a statistical value.
A survey covering 0 different suburbs in Dallas found the average price of gasoline to be $3.924 per gallon with a population standard deviation of $0.053. What critical value shoiuld be used to test the claim using a = 0.01?
T-scores are used on some psychological tests, such as the MMPI. T-scores have a mean of 50 and a standard deviation of 10, and therefore a z-score of -1 (one standard deviation below the mean) would be converted to a T-score of 40.
Provided that the selected student excels in sports, determine the probability that the student is a boy?
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