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The following joint probability table shows the information for a sample of 200 companies with one variable indicating the industry and the other variable indicating the sector in which a company is operating: Sector Industry Retail Financial Formal 0.03 0.24 Informal 0.17 0.56
a) If it is known that a company is in the financial industry, what is the probability that it operates in the informal sector?
b) If it is known that a company is not in the financial industry, what is the probability that it operates in the informal sector?
c) What conclusion can be drawn by comparing the answers in a) and b)
If one or the other has to be right, what probabilities would we assign to their claims if it were found that 11 of 12 newly hired teachers stayed with the school for more than a year?
A City Survey states that 70 percent of all business owners favor increasing the parking fees. The city has commissioned a random sample of n = 100 business owners.
How much should be invested in each type of bond under the following? conditions?
Consider the ISTEP scores (see Exercise 3.86), which we can assume are approximately Normal, N(572, 51). Give the z-score for a student who received a score of
suppose that you were trying to determine if the population proportion of americans that currently believe that nuclear
Consider the following hypotheses.H0:p
What is the probability of under running the POE?
suppose that you pick 10 adult males at random. what is the probability that at least one of them has bmi more than q3
Two fair dice are tossed twice. Find the probability that the sum is 10 or less on the first toss and the sum is 8 or more on the second toss.
Conduct the six steps of hypothesis testing to find your answer and use a = .01.
Using the 2.5% significance level, can you conclude that the use of the gasoline additive increases the gasoline mileage? Assume that the population of paired.
Jane Delavan ran against Jeremy Bryson for state senate. In one precinct, one of the two voting machines did not work, and 227 votes were cast on the broken.
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