Mathematics, 27.11.2019 02:31 ijohnh14
According to the american center for disease control, the percentage of cigarette smokers among american adults in 2005 was 20.9% (and therefore, the percentage of non-smokers was 79.1%). as a health psychologist, you are interested in knowing if the prevalence of smoking has changed. last year, you sampled 500 american adults and found that 72 of them reported being cigarette smokers and that 428 reported being non-smokers. perform the appropriate test. is this a goodness of fit test or a test of independence?
Answers: 3
Mathematics, 21.06.2019 17:00
Given f(x)=2x^2-8x+6 and g(x)=3x-1 find f(x) +g(x) a. 2x^2+5x+5 b.2x^2-11x+7 c. 2x^2-5x+5 d.2x^2-5x-5
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Mathematics, 21.06.2019 17:30
Mickey needs to cut pieces of ribbon that are each 1 meter long tie onto balloons. if he has 8 pieces of ribbon that are each 1 dekameter long. how many 1 meter pieces of ribbon can he cut
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Mathematics, 21.06.2019 18:40
2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?
Answers: 1
Mathematics, 21.06.2019 19:30
Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2
Answers: 1
According to the american center for disease control, the percentage of cigarette smokers among amer...
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