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Recognize sample, population, sample statistic, and population parameter:
Nasonex is the drug used to treat allergy symptoms. In the test of Nasonex, 374 children aged 3 to 11 years were treated with 100 micrograms of Nasonex, and 17% of them experienced headaches.
A local bank reported to the federal government that its 5,246 saving accounts have a mean of $1,000 and standard deviation of $240.
A study is conducted to assess the impact of caffeine consumption, smoking, alcohol consumption, and physical activity on the risk of cardiovascular disease.
The average hourly wage of employees of a certain company is $9.83. Assume the variable is normally distributed.
The number of sit-ups that a person can do in one minute, both before and after a physical fitness course was recorded. The data is shown below for 10 randomly selected participants.
How many business majors would be required to evaluate mean salary to within 10 with 95% confidence if population standard deviation is %200.
A study of 20 worldwide financial institutions showed the correlation between their assets and pretax profit to be .86. At the .05 significance level
What proportion for smoking teenagers think their peers care a lot about keeping their weight down?
Assume a restaurant business succeeds 60% of the time. Suppose that there are three such restaurants open in your city. When they don't compete with one another
The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 3.0. Assume 36 golfers played the course today. Find the probability that the average score of the 36 golfers exceeded 71.
For the mold described in (g), can you find the probability that it's COST value will exceed $150,000? If yes, obtain this probability. If no, why not?
Design a 95 percent confidence interval for the proportion of defectives in a large lot, if a sample of 200 showed 12 defectives.
For one of the first statistics exam, the coefficient of determination between hours studied and the grade earned was 80 percent. The standard error of estimate was 10.
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