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1. Among a group of mentally handicapped 10-year-old children, it is found that the correlation between IQ and reading achievement is .25. However, on a school-wide basis the correlation is .50. Assuming these results to be typical, what explanation do you suggest?
2. To study creativity, a number of outstandingly creative persons are assembled and tested. It is found that ratings on creativity and IQ correlate.20. It is concluded that creativity is really quite different from intelligence. Describe any objections you have to this conclusion.
A carnival game offers a $100 cash prize for anyone who can break a balloon by throwing a dart at it. It costs $5 to play (they keep your $5 , even if you win the $100), and you're willing to spend up to $20 trying to win. You estimate that you ha..
50 seconds and a standard deviation of 50 seconds. Find the probability that a randomly selected boy in secondary school can run the mile in less than 335 seconds.
Calculate the probability that the average number of minutes that diners spend at their table for dinner will be less than 100 minutes.
What proportion of aircraft flew more than 2200 hours during the year?- What proportion of aircraft flew between 2000 and 2400 hours during the year?
the intelligence quotient iq test scores are normally distributed with a mean of 100 and a standard deviation of 15.
let x denote the amount of time for which a book on 2-hour reserve at a college library is checked out by a student and
a company employers 800 men under the age 55. suppose that 30 carry a marker of the male chromosome that indicates an
How large a sample must one take to be 90% confident that the estimate is within 0.05 of the true proportion and find the 99% confidence interval of the population proportion of persons living in Phoenix who are obese.
Write a table that gives the cumulative probability distribution for X.- What is the value of P(X ≤ 2), the probability that a randomly selected person ate two or fewer meals yesterday?
What is the probability that the father spends at least 8 hours with his child in a given week?- What is the probability that the father spends between 6 and 7 hours with his child in a given week?
1. What was the myth and what was the reality of the new professional woman of the 1920s? 2. Who opposed U.S. involvement in World War I and why?
Consider a balanced four by three factorial. Show that orthogonal contrasts in row means (ignoring factor B) are also orthogonal contrasts for all twelve treatments when the contrast coefficients have been repeated across rows (ij = i).
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