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An applicant must score at least 80 points on a particular psychological test to be eligible for the Peace Corps. From nearly 30 years experience, it is known 60% of the applicants meet this requirement. Let the random variable x be the number of applicants who meet this requirement out of a (randomly selected) group of 25 applicants.
1. Find the mean of x.
2. Find the standard deviation of x.
3. Using the Empirical Rule, within what limits would you expect most (say, 95%) of the measurements to be?
Construct a 95 percent confidence interval for the population proportion of positive drug tests. Why may you assume that this is a normal distribution?
How many business students must be randomly selected to estimate the mean monthly earnings of business students at one college?
The probability of the patient being chosen at random as having meningitis as only site of infection is?
hamilton county judges try thousands of cases per year. in an overwhelming majority of the cases disposed the verdict
A person purchased a slot machine and tested it by playing it 1,245 times. There are 10 different categories of outcomes, including no win, win jackpot, win with three balls, and so on.
Following data on x=weight (in pounds): x 1 33.5, x2 27.3, x3 36.7, x4 30.5 Suppose that one more piece is selected; denote its weight by x5. Find a value of x5 such that X = smaple median.
Confidence interval for the population mean.
You calculate that their mean monthly rent is $613 and their standard deviation is $96. What are the degrees of freedom for a one-sample -statistic?
What is the best estimate of the average tread life in miles for the entire population of these tires?
According to the website of mars, 21% of m&m's produced are green. suppose 4 candies are selected at random and number of green recorded create a probability distribution for this situation.
Approval rating of 48% within a margin of error of 3%. Construct a confidence interval for the population proportion (p) of adults who approve of the candidate.
a mechatronic assembly is subjected to a final functional test. suppose that defects occur at random in these
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