Scores of adults on an iq test
The scores of adults on an IQ test are approximately normal with a mean of 100 and standard deviation of 15. Corrine scores 118 on such a test. She scores higher than what percent of all adults?
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A radio manufacturer claims that 65% of teenagers 13 to 16 years old have their own portable radios. A researcher wishes to test the claim and selects a random sample of 80 teenagers. She finds that 57 have their own portable radios. At a=0.05 sho
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Statistic, this question about statistic and probability.. i hope you can help me to solve this problems. thanks you...
Corporate finance, 1. Follies Bookstore, the only bookstore close to campus, had a net income of $90,000 in 2009. Here are some of the financial ratios from the annual report. Profit Margin 12% Re
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