Mathematics, 01.03.2021 21:30 genyjoannerubiera
Refer to The Journal of Finance (December 2011) study of whether the decision to invest is dependent on IQ. The summary table giving the number of the 158,044 Finnish citizens in nt category is reproduced below. Suppose one of the citizens is selected at random. IQ Score Invest in Market No Investment Totals 1 893 4659 5552 2 1,340 9409 10749 3 2009 9993 12002 4 5358 19682 25040 5 8484 26640 33124 6 10270 21673 31943 7 6698 11260 17958 8 5135 7010 12145 9 4464 5067 9531Totals 44651 113393 159044 a. Given that the Finnish citizen has an IQ score of 6 or higher, what is the probability that he/she invests in the stock market? b. Given that the Finnish citizen has an IQ score of 5 or lower, what is the probability that he/she invests in the stock market? c. Based on the results, part a and b, does it appear that investing in the stock market is dependent on IQ? Explain.
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Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)
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Refer to The Journal of Finance (December 2011) study of whether the decision to invest is dependent...
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