Answers created by Ramchandran A.
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What are the mean and standard deviation of a binomial probability distribution with #n=130 # and #p=3/4 #?
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What does the confidence interval of a sample tell you?
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Why can't variance be negative?
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Why is sample size important when analyzing data?
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How do you determine the variance of a Poisson distribution?
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What defines a strong or weak correlation?
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What is central tendency?
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What is the difference between correlation and association?
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What does a negative covariance mean?
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Is there a difference between a correlation and a correlation coefficient?
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What is statistical significance?
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What is Bayes' theorem?
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What is Bayes' theorem?
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What is Bayes' theorem?
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What is Bayes' theorem?
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If the probability of events A & B occurring are P(A) = 0.3 and P(B) = 0.8, what is the probability that both A & B occur?
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What is a binomial distribution?
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Why can a binomial distribution be used to model the results of a coin toss?
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What is the relationship between the correlation of two variables and their covariance?
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What does a correlation coefficient indicate about data?
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What is the mathematical formula for the variance of a continuous random variable?
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Why is a 90% confidence interval narrower than a 95% confidence interval?
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The probability that a contractor will get a plumbing contract is 2/3 and the probability that he will get an electric contract is 5/9. If the probability of getting at least one contract is 4/5, what is the probability that he will get both?
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What is the difference between the mean, median, and mode?
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What is the expected value of a coin toss game where you win $2 for each heads and lose $3 for each tails?
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What does independent and identically distributed mean?
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If you roll a fair die three times, what is the probability that none of your rolls is a number divisible by 3?
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What does discrete mean?
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What can covariance be used for?
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What does it mean if the correlation coefficient between two variables is negative?
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A 28-year-old man pays $165 for a one-year life insurance policy with coverage of $140000. If the probability that he will live through the year is 0.994, what is the expected value of the insurance policy?
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What is the variance of 10 coin flips?
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Can a continuous random variable have a median?
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How are continuous and discrete treated differently?
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In a symmetric distribution, are the mean, median, and mode necessarily equal?
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Why is standard deviation not a measure of central tendency ?
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What does quantitative mean?
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What is a correlation?
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What happens to the confidence interval if you increase the confidence level?
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What does a 95% confidence interval versus a 99% confidence interval tell you?
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The 6 entries in Claudia's checkbook ledger show both deposits and withdrawals. Claudia wrote down $100, -20, -35, $250, -$150, and -85. What is the mean dollar amount for these entries?
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How do you calculate the expected value of a random variable?
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Question #50c00
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How does the sample variance differ from the population variance?
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What is the variance of a binomial distribution for which n = 75 and p = 0.20?
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What is the variance of {15, 14, 13, 13, 12, 10, 7}?
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A bin contains 71 light bulbs, of which 9 are defective. If 6 light bulbs are randomly selected from the bin without replacement of the selected bulbs, what is the probability that all of the selected bulbs are good?
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What is the purpose of hypothesis testing in statistics?