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West south Airline flies the route Los Angeles and Oakland. The mean number of passengers per flight is 160 with a standard deviation of 20. The aircraft used for the route has 200 seats.
(a) What percent of the flights are sold out?
(b) The airline must sell 150 seats to break even on this particular flight. On what percent of the flights does the airline make money?
Find out the mean number of letters that will arrive in two days.
Evaluate true mean delivery time to within 5 minutes at 90% reliability level? Suppose that standard deviation for delivery times is 18.2 minutes.
What percentage of the averages or medians of the sample will be greater than 140 seconds?
Graph the distribution using a histogram. Calculate the mean and standard deviation.
Dividend is expected to grow 7% a year for next 3 years and then at 5% a year after that. Determine the expected dividend per share for each of the next five years?
Determine Probability using exponential distribution.The average time between failures of a laser machine is exponentially distributed with the mean of 40,000 hours.
The p-value of the test is closest to:
A teacher gave a 25 question multiple choice test. After scoring the tests, she computed a mean and standard deviation of the scores. The standard deviation was 0. Based on this information
By using significance level a = .05, and suppose a normal distribution what does evidence conclude?
It was reported that 20 readers responded and 87% said "no" while 13% said "yes." Recognize 4 major flaws in this survey.
Let p represent the proportion of registered voters in the state that would vote for the Republican candidate. The standard error for the proportion of those who phoned in who answered "yes" is
Such things as historical documents, newspaper reports, TV and radio broadcasts, when used in research, represents
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