Exercise normal distribution, Ejercicios de Estadística

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” AP Státistics — Hoxmeier Normal Distribution Examples Name: Var . A 1. Joanie scored a 93 on the history test and Chachi had a score of 81, The mean score was an 85 and the standard deviation of 3.62. What are each of their z-scores? What does this tell us?. - . 2-SE0I: - h- Jennie! 9 Ániess 2,24 Stel dey Qlaut uan. Chacho. 21-95 . ar = a Tf Potsie scored an 81 on the biology exam can we compare them? Given the mean of 75 and standard colar the biology exam, what does that mean in comparison with Joanie and Chachi? 2. A certain density curve consists of a straight line segment that begins at the origin, and has a slope of 1. a. Sketch the density curve. What must the coordinates of the right endpoint of the segment be in order for it to be a valid density curve? b. Determine the median, first quartile and third quartile. e. Relative to the median, where would you expect the mean of the distribution to be? d. What percent of the observation lie below .5? Above 1.52 e. [sit possible to draw a box and whisker plot using this information? If so draw it, ifnot, why? 3. The line segment below can be considered a density “curve”. a. Verify that the graph above is a valid density curve. b. — Find the proportion of the values between .6 and .8. C. — Find the proportion of the values that fall between O and .4 d. Find the proportion of the values that fall between 0 and .2 07 04 5 e. Where does the median fall? In terms of the median, where docs the mean fal?