STA255 Tutorial

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Department
Statistical Sciences
Course
STA255H1
Professor
Augustin Vukov
Semester
Fall

Description
Histogram of AlO 0.20 0.15 0.10 Density 0.05 0.00 10 12 14 16 18 20 AlO 1.8 a. The histogram is above. b. The data appears to be bimodal. Llanederyn and Caldicot have lower sample values than the other two. 1.16 a. Without the extreme value, y = 4.19 and s = 1.44. b. These counts compare more favorably: k interval frequency Exp. frequency 1 2.75, 5.63 25 26.52 2 1.31, 7.07 36 37.05 3 -0.13, 8.51 39 39 n n n n 1.22 (See exercise 1.11)  (y i y) =  yi– ny   y i  yi 0 . i1 i1 i1 i1 2.4 a. b. 2.20 a. P(G) = P(D1) = P(D2) = 1/3. b. i. The probability of selecting the good prize is 1/3. ii. She will get the other dud. iii. She will get the good prize. iv. Her probability of winning is now 2/3. v. The best strategy is to switch. 2.34 a. Three patients enter the hospital and randomly choose stations 1, 2, or 3 for service. Then, the sample space S contains
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