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Out of the people who wear seat belts, northeast has 148. Out of the people who don't wear seat belts, northeast has 52. A total of 858 wear seatbelts in the United States. What is the probability of seat belt usage by region of the country?
Business Economics, Economics
What is the difference between accounting costs and economic costs? Why do economic costs include both explicit (revealed and expressed) costs and implicit (present but not obvious) costs? What are the differences betwee ...
It was reported that 72 % of Americans don't exercise at least 30 minutes each day. If three people are selected at random, find the probability that all three will say that they don't exercise at least 30 minutes each d ...
What do economists mean when they say "that here is no such thing as a free lunch"?
How does the Monopolies Make Production and Pricing Decisions in Economics?
Determine the sample size n needed to construct a 99?% confidence interval to estimate the population mean when σ=24 and the margin of error equals 9.
WHYY is it necessary to calculate a "pooled standard deviation" when calculating the effect size of an independent-samples t test but not when calculating the effect size of any other type of t test.
Suppose A and B are collectively exhaustive. In addition, P(A) = 0.2 and P(B) = 0.8. Suppose C and D are both mutually exclusive and collectively exhaustive. Further, P(C|A) = 0.7 and P(D|B) = 0.5. What are P(C) and P(D) ...
Question 1 Find the area between .-88 standard deviations below the mean and 2.35 standard deviations above the mean. '88=.3106 and 2.3=.4906 Both figures are added .3106+.4906= .8012 which is 80.12% Question 2 The area ...
Staples has six special drafting pencils for sale, two of which are defective. A student buys two of these six drafting pencils, selected at random. Let the random variable X be the number of defective pencils. Construct ...
Adult male heights X have N(70", 3.3") a.) What percent of adult males are shorter than 63"? b.) What percent of males are taller than 70"? c.) What's the 80th percentile of male heights? Show work
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