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Suppose 55% of students are female, of which 4/5 (44%) have long hair, and 45% are male, of which 1/3 (15% of all students) have long hair. What is the probability that a student chosen at random will either be female or have long hair (or both)?
Suppose that distribution of grades has average of 78 with standard deviation of 11. Find the appropriate cutoff points for the grades A and F.
Assuming normal populations with equal standard deviations, and using the 0.10 level, is there a significant difference between the two routes?
Identify the characteristics of the comparison distributions; specifically, their sample means and sample standard deviations, and the quantities.
a national magazine claims that the average college student watches less tv than the general public. the national
Define the decision rule. Calculate the value of the test statistic.
To test H: u = 20 versus H:u
Assume that demand for services per period is Pt = 1000 - Qt where Qt is the stock of the durable consumed. Let the discount factor for consumers and the firm be given by δ. Find the profit-maximizing prices and outputs for a durable goods monopol..
consider a random sample from a poission ditribution xipoiu.ashow that yne-xnbarconverges stochastically to
A sample of 20 cigarettes is tested to determine nicotine content and the average value observed was 1.2 mg. Compute a 99 percent two-sided confidence interval for the mean nicotine content of a cigarette if it is known that the standard deviation..
In the regards to a stem-and-leaf plot that best represents the given data, what would the stem be? Determine which stem would have the most leaves and explain what this means in terms of the GPA's.
question samples of size n 5 are collected from a process every half hour. after 50 samples have been collected we
let x have the probability density functionfx2x 0 lt x lt 1 and 0 otherwisecompute the probability that x is at least
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