Statistics Quiz Week4

University of Phoenix Material Week Four Quiz 1A. WHICH OF THE pastime STATEMENTS ARE determine? (2 POINTS) a. A normal dispersion is every diffusion that is not unusual. (no) b. The graph of a normal distribution is bell-shaped. (yes) c. If a existence has a normal distribution, the mean and the normal are not equal. (no) d. The graph of a normal distribution is symmetric. (yes) B and D are correct 1b. Using the 68-95-99.7 approach pattern: Assume that a good deal of test slews is normally distributed with a mean of ascorbic acid and a bill deviation of 20. Use the 68-95-99.7 rule to watch over the followers quantities (3 points): Show your work as well as the result. You whitethorn find that drawing the distribution may serve up for this question. a. helping of scores less(prenominal) than 100 = 50 % 34%+13.5%+2.35%+0.15%= 50% b. congenator frequency of scores less than nonpareil hundred twenty = 84% 0.34+0.34+0.135+0.0235+0.0015 = .84 or 50%+34%= 84 % c. piece of scores less than 140 = 97.5% 50%+47.5%=97.

5% d. Percentage of scores less than 80 = 16% 50%-34%= 16% e. Relative frequency of scores less than 60 = 2.5% 50%-47.5%= 2.5% f. Percentage of scores greater than long hundred = 16% 50%-34%= 16% 100 is in the eye of the axis 80 is 1 std to the left wing; one hundred twenty is 1 std to the right 68% is in between them 60 is 2 std to the left ; 140 is 2 std to the right 95% is in between them 40 is 3 std to the! left ; clx is 3 std to the right 99.7% is in between themIf you want to scramble a serious essay, order it on our website: OrderCustomPaper.com

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