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A new test was designed to have a mean of 80 and a standard deviation of 10. A random sample of 20 students at your school take the test and the mean score turns out to be 85. Does the score differ significantly from 80?
"Factorial" means that the treatments are formed from more than one factor. What are the factors? What do "double-blind" and "placebo-controlled" mean?
Based on these results, is there significant difference between attitudes for males and for females? Use two tailed test with alpha = .05.
Suppose that SAT score is normally distributed with a mean 988 and a standard deviation of 211 in 2004.A local college plans to set up a scholarship budget for 2005 where $5000 will be awarded to each incoming freshman whose SAT score is higher th..
1. What do discrete random variables describe? 2. Explain joint probability. 3. Explain conditional probability.
Create a 99 percent confidence interval for mean daily intake of milk. You may suppose daily intake amounts are usually distributed.
Explain the difference between independent samples and dependent samples. Classify the following as independent or dependent samples:
Suppose a random sample of 50 architects and engineers is selected. How likely is it that the random sample contain five or fewer women in these positions.
MATH1550H: Assignment: Question: A word is selected at random from the following poem of Persian poet and mathematician Omar Khayyam (1048-1131), translated by English poet Edward Fitzgerald (1808-1883). Find the expected value of the length of th..
What role of operations that applies when you are solving an equation does not apply when you are solving an inequality? What is the inherent meaning and justification of cross-multiplication as it applies to solving an inequality?
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the oth..
Assume P1 and P2 move simultaneously. Represent this game in normal form.
normal approximation to the binomial distribution.at a certain community college 60 of the students are female. if 300
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