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A study found that the average time it took a person to find a new job was 3.5 months. If a sample of 30 job seekers was surveyed, find the 90% confidence interval of the mean. Assume the standard deviation of the sample is 0.5 month.
At the .01 significance level, is there a relationship between job pressure and age?
At the .01 signficance level, can we conclude that there is more variation in the selling prices of the oceanfront homes?
ben claims that the average price of a car wash in west newton is more than 6.00. a sample of five car washes has an
Consider a random sample of 200 shafts, and let X denote the number among these that are nonconforming, what is the (approximate) probability that X is: At most 30.
in a test of effectiveness of garlic for lowering cholesterol 42 subjects were treated with garlic in a processed
researchers investigated the issue of race and equality of access to clinical trials. the table below shows the
How far away from the mean is she (or how many standard deviation units away from the mean is she) and find the interquartile range of this distribution of X.
Could you conclude that Queens College Professors live longer than average? Use the appropriate two-tailed test with an α = 0.05. Also, construct a 95% confidence interval. Do the statistical test and the confidence interval agree? Write up your resu..
Assume that a hand of 12 cards is dealt from a normal deck of 52 playing cards. What is the probability that of the 12 cards, 3 will be diamonds, 3 will be clubs, 3 will be spades, and 3 will be hearts.
What statistic would be applied if the independant variable is nominal and one dependant variable is nominal and one dependant variable is scale? Is this a T-test?
What is the most probable number of patients arriving each Saturday and give the main assumptions we make when we model the above situation using a Poisson distribution.
Develop separate schedules by using the FCFS,SPT and EDD rules. Compare the schedules on the basis of average flow time,the average early time and average past due hours for any order.
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