Randomly chosen and number of on time
According to an airline, a specific flight is on time 91% of the time. Assume 49 flights are randomly chosen and the number of on time flights is recorded. What is the probability that between 42 and 44 flights, inclusive are on time?
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An unbiased estimator will have a value, on average, that is equal to the value of the population parameter it estimates, regardless of sample size. True or False?
A 95% confidence interval for mean, µ, of a population computed from a random sample is found to be 9 ± 3. Based on this, which of the following statements is true?
If we had 6 red balls and 6 green balls(all enumerated), and if we were randomly picking the pair of those balls, the probability of having 3 pairs of red balls only would be computed by the following formulae: (6!/((2!)^3 3!)^2 / (12!/((2!)^6 6!)
The metropolitan area of Los Angeles-Long Beach, California, showed the largest increase in the number of jobs between 1986 and 2001. The number of jobs increased from 5,147,400 to 6,290,500. What was the geometric mean expected yearly rate of in
You survey 300 people and find out that 80 of them don't have siblings. Is this significantly different from 25% know for the US average? Find out the z* value that you will employ to test this question. Provide your answer as 0.XX
You survey 300 people and find that 75 of them have been to the concert in the last year. You want to compare this to 10% value known for US population. What test will you use:
How many different orderings of the top 4 would be possible (order does matter)?
A real estate agent compares selling prices of homes in two municipalities in southwestern Pennsylvania to see if there are differences in price. The results of the study are shown below. How would you calculate a p value?. Use the alpha of 0.01
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