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show all work. What is the probability that a randomly selected US resident did not live in Idaho? The total 2008 US population was 303,824,640. The 2008 population for five states are, Alaska 686,293, California 36,756,666, Hawaii 1,288,198, Idaho 1,523,816, and Indiana 6,376,792.
A pharmaceutical company has developed a screening test for a rare disease that afflicted 2% of the population. Unfortunately, the reliability of this test is only 80%, which means that 20% of the tested will get a false positive.
Scores by women on the SAT-I test are normally distributed with a mean of 998 and a standard deviation of 202. Scores by women on the ACT test are normally distributed with a mean of 20.9 and a standard deviation of 4.6.
A coin is tossed 25 times. let x + the number of tosses that result in heads(H) Consider the following rule for deciding whether or not the coin is fair. What is the probability of judging the coin to be biases when its actually fair?
If a single test is run and indicates that oil is present, what is the revised probability that oil is actually present?
Attended a religious service at least once a month, 20 stopped to help a person with car trouble. At the 0.05 significance level, test the claim that the two proportions are equal.
At the time she was hired as a server at the restaurant, Beth was told, "You can average more than $20 a day in tips." Over the first 31 days she was employed, the mean daily amount of her tips was $21.76,
In a high school graduating class of 100 students, 42 studied math, 68 studied psychology, 54 studied history, 22 studied both math and psychology, 7 studied history and neither math nor pyschology, 10 studied all three and 8 did not take any of t..
After 1,000-trial simulation, examine statistical information generated and compare output of simulation with your findings in Problem .Briefly describe the significant similarities and differences.
We recalculated our comparison of ideal number of children, this time only for women, separating them into two groups, those who indicated that they were "very happy" or "not at all happy" with life.
Duracell Ltd claim that the life of their batteries in motorised soft toys is approximately normally distributed with a mean of 102.9 hours and a standard deviation of 16.5 hours.
20% of their customers purchase package 3 and 25% of their customers purchase package 4. Find the expected value or average profit per customer.
The mean area of several thousand apartments in a new development is advertised to be 1250 sq. ft. An engineer measured a random sample of apartments: 1244 1245 1242 1245 1237 1245 1246 1232
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