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To estimate the proportion of unemployedworkers in Panama, an economist selected at random 400 persons from the working class. Of these, 25 were unemployed.
a. Estimate the true proportion of unemployed workers and place bounds on the error of estimation.
b. How many persons must be sampled to reduce the bound on the error of estimation to .02?
Find the moment generating function of their sum and identify the corresponding distribution, its mean and its variance.
A random variable X is normally distributed with mu = 60 and standard XXX = 11. What is zscore for X = 71
1. consider the random variable x with the probability mass function pie-22iiwhat is px0?2. consider a fair coin. we
for a continuous random variable x p28 ? x ? 68 0.2 and px gt 68 0.11. calculate the following probabilities. leave
The president of Doerman Distributors, Inc., believes that 30% of the firm's orders come from first-time customers. A random sample of 100 orders will be used to estimate the proportion of first-time customers. Assume that the president is correct..
Martin Motors has in stock three cars of the same make and model. The president would like to evaluate the gas consumption of the three cars (labeled car A, car B, and car C) using four different types of gasoline. For each trial, a gallon of gaso..
A ball is then selected at random from urn 2. if the ball selected from urn 2 is red, what is the probability that the ball transferred from urn 1 was...(i)red?
The faces of a 3-regular polyhedron are all squares or hexagons. How many square faces can the polyhedron have? Does the number of square faces uniquely determine the polyhedron?
Compute the population mean, the population median, the population midrange, the population range, the population variance, the population standard deviation, and the population proportion of odd numbers. Verify the following results:
on a multiple choice test of 13 questions each question has four 4 possible answers one of which is correct. for
q1. if you use a 0.10 level of significance in a two-tail hypothesis test what is your decision rule for rejecting a
seventy percent of houshold say the would feel secure if they had 50000 in saving. you randomly select 8 houshold and
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