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In answering a question on a multiple-choice test a student either knows the answer or guesses. Let p be the probability that she knows the answer and 1 - p the probability that she guesses. Assume that a student who guesses at the answer will be correct with probability 1/m, where m is the number of multiple-choice alternatives. What is the conditional probability that a student knew the answer to a question given that she answered it correctly?
Is a football jersey number a quantitative or a categorical variable? Support your answer with a detailed explanation
Define the decision rule. Calculate the value of the test statistic.
The standard deviation of the population of completion times is minutes, what is the minimum sample size needed for the managers to be confident that their estimate is within minutes of?
What is the questionnaire score that separates customers who are considered risk averse from those who are not? Carry your intermediate computations.
Standard deviation of $50. Provide a 95% confidence interval estimate of the variance of the population of the checking accounts.
Determine the special property of standard normal distribution, compared to other normal distributions?
Normal distribution with average 500 and SD 100. A college wants their students to be in the top 12.5% for verbal aptitude. What minimum qualifying score should they set?
A company is interested in knowing which are the potential sales next year if you use $ 20,000 in advertising expenses. The company uses the information from previous years to make its sales forecast.
Find the expected value of the number of tests taken.
If the computer manufacturer decides to sample 2,300 of the microchips received in each shipment, what acceptance number, c, would they want?
Fit a linear regression model for bp against sodium. Do you think this is a model with a good fit? Why?
A researcher hypothesized that individuals who listen to classical music will score differently from the general population on a test of spatial ability. On a standardized test of spatial ability, u = 58. A random sample of 14 individuals wh..
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