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Identify a key variable that you want to predict, and specify at least two variables that you think would be key in making that prediction. Be sure that at least one of these variables is quantitative. Are there qualitative variables that might be useful? Explain how you might collect the data to perform this kind of study.
43 students, 22are sophomores, 28are chemistry majors, and 11are neither. What are the probability that the student is both a sophomore and a chemistry major?
Find out the p-value associated with test of hypothesis you conducted?
Test the teachers hypothesis that there is a significant difference between the pre and post tests.
Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet.
Find a 95% confidence interval for the population mean selling price of all homes in this neighborhood.
The length of a particular telemarketing phone call has an exponential distribution with a mean equal to 1.5 minutes. Find the probability that the length of a randomly selected call will be between 30 - 50 minutes and 1 minuter or longer.
Projection are form the U.S. National Center for Education Statistics>. Create a multiple bar graph of data, and then explain any trends.
Calculate a 92% confidence interval for the mean density of quartz porphyry, given that 75 samples yield mean of 2.62 grams per cubic centimeter
A stationery store wants to estimate the mean retail value of greeting cards that it has in its inventory. A random sample of 100 greeting cards indicates a mean value of $2.55 and a standard deviation of $0.44.
A standard for full credibility of 1,000 claims has been selected so that the actual pure premium will be within 10% of the expected pure premium 95% of the time. The number of claims has the Poisson distribution. Determine the coeffcient of vari..
Let z represent the standard normal variable and suppose a value is randomly selected. Find each of the following probabilities by:
P(A 1 )= .20, P(A 2 ), and P(A 3 )= .40. P(B 1 I A 1 ) = .25. P(B 1 I A 2 ) = .05. P(B 1 I A 3 )=.10. Use Bayes' theorem to determine P(A 3 I B 1 )
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