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In a multiple choice quiz there are 10 questions. Each question has 6 possible answers. Supposing that the student guesses at each of the question:
a. Find the probability that the student answers 7 questions correctly.
b. Find the probability that the student passes the test (i.e. gets at least 50%)
c. How many questions can the student expect to answer correctly?
if the probability is 0.1 that a person will make a mistake on his or her state income tax return find the probability
The following table shows the distribution of the candidates per municipality.
Find the percentage of people married in each of the given years, and describe the trend over time.
Show the histograms and calculate their means and variances and comment on your findings.
an investor is considering purchasing a small business. he knows that in case of a good market the business will yield
a survey by accountemps asked a sample of 200 executives to provide data on the numberof minutes per day office workers
Identify the number of conditions in a factorial design on the basis of knowing the number of independent variables and the number of levels of each independent variable.
You probably never thought of yourself as a lawbreaker, right? Most likely you would not go into a music store and steal a CD or DVD, or go into a bookstore and steal a book. But, would you download something that you had not purchased? Would you ..
a brand of television has a lifetime that is normally distributed with a mean of 7 years and a standard deviation of
Suppose Alice flips three fair coins, and let X be the number of heads showing. Suppose Barbara flips five fair coins, and let Y be the number of heads showing.
A researcher wants to create a 99% confidence interval for the population mean. He has a sample of n=120, an x-bar of $340, and a sample standard deviation of $122. What is the margin of error?
Testing a genetic model Biologists wish to cross pairs of tobacco plants having genetic makeup Gg, indicating that each plant has one dominant gene (G).
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