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Question: According to an internet posting, 80% of adults enjoy drinking beer. Choose a group of 3 adults at random. The probability that none of them enjoy drinking beer is:
a. 0.333
b. 2.400
c. 0.267
d. 0.008
The manager of Sam's Food Mart guarantees that none of his cartons containing a dozen eggs will contain more than one bad egg, despite the fact that 4% of individual eggs are known to be bad. Define the random variable x to be the number of bad eg..
The casino game craps is based on rolling two dice. Here is the assignment of probabilities to the sum of numbers on the up face when two dice are rolled:
Use this information to construct a probability table, and then calculate each of the following probabilities:
The main purpose of this exercise is to check your understanding of significance level, p-values and power .
You take a random sample and perform a hypothesis test, getting a p-value of 0.2578. What is the appropriate conclusion? Conclude at the 5% level of significance.
Determine the coefficient of correlation. Interpret the relationship between BAC and age using the correlation coefficient. Determine the coefficient of determination. Interpret.
Based on the empirical data determine the following probabilities:
The following table gives the approximate age distribution in the United States from the 2000 census.
The trend line y = 0.70 + 0.005t was calculated from quarterly data for 1999 -2003, where t = 1 for the first quarter of 1999. The seasonal indexes computed from the trend line for the four quarters of the year 2004 were .85, 1.05, 1.15, and .80, ..
He surveys a sample of 40 students and finds that for the most recent semester their average cost was $430 with a standard deviation of $80. What is the test value for this hypothesis test?
It is a striking fact that the first digits of numbers in legitimate records often follow a distribution known as Benford's Law, shown below.
What is the probability that the variable will take the value 2? What is the mean of the distribution?
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