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The number of beetles in a lawn varies with an average of 1.3 square yard. What is the approximate probability of obtaining a sample of a square yard of lawn with at most one beetle?
forty percent of the homes constructed in the quail creek area include a security system. three homes are selected at
assume that the density of chokecherry trees prunus virginiana in a degreaded forest is 32 trees per 1000m2nbspand
A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighted on a very accurate scale. The results in grams were:
Proportion nonconforming is 0.10. what is the probability of (1) 1 nonconforming unit in the sample (b) 1 or less (c) 2 or more?
A new shopping mall is considering setting up an information desk manned by one employee. Based upon information obtained from similar information desks, it is believed that people will arrive at the desk at the rate of 15 per hour.
When no natural gas is present the test is accurate 90% of the time. Find the best set of decision for the landowner to maximize her profit.
the number of books checked out at a public library by a sample of eight primary school children were recorded6 4 5 7 5
The study does not give sufficient evidence to support the claim that less than 75% of college students spend less than $250 per semester on textbooks.
A recent report from the American Medical Association claims that for the first time in ten years, the average salary of psychiatrists was greater than $190,000 with a standard deviation of $27,000. What is the null hypothesis for his claim?
How is a sampling distribution of the mean similar to and different from a distribution of raw scores? What is the standard deviation of a sampling distribution of the mean called? How is it affected by sample size?
an automobile manufacturer is concerned about a fault in the braking mechanism of a particular model. the fault can on
Assume that this city has 1100 shoppers aged 12 to 14 years and 900 shoppers aged 15 to 17 years. Find the mean amount spent per person per month by shoppers aged 12 to 17 years in this city.
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