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Suppose you were given a three-question multiple -choice quiz in which each question had four optional answers
a) What is the probability of getting a perfect score if you were forced to guess at each question?
b) Suppose it takes at least two correct answers out of three to pass the test. What is the probability of passing if you are forced to guess at each question? What does this indicate about studying for such an exam.
c) Suppose through some late-night studying you are able to correctly eliminate two answers on each question. Now answer parts a and b.
If we select a crew member at random, what is the probability the crew member earns:
A random sample of 10 shafts has an average diameter of 0.2545 inches. a) Construct a 99% confidence interval of the true mean
Can we conclude at the 5% significance level that the population mean weight of athletic men is lower than the population mean weight of non-athletic men?
Find out the least-squares regression line and interpret its slope.
Develop a 90 percent confidence interval for the proportion opposing health care changes. (Round your answers to 4 decimal places.)
Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days.
Any value which is based on having measured a sample is called:
For the sample of men, performance on the simulator task declined by an average of 2.9 points with s = 4.1. Is this a statistically significant change? Use a two-tailed test with = .05.
Use frequency distribution to create a probability distribution, determine the (b) mean,(c) variance and (d) standard deviation of probability distribution and (e) interpret results in context of real life situation.
Construct a 90% confidence interval for the population proportion p . Does your result agree with your conclusion in part (a)?
Which of the following statements regarding the coefficient of correlation is true. A value of 0.00 indicates two variables are not related.
Let X 1 , X 2 , X 3 , X 4 be a random sample from a Poisson distribution with parameter λ and let Y = X 1 + X 2 + X 3 + X 4 . You decide to test λ = 1.60 versus λ
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