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stat1601quiz2

# stat1601quiz2 - STAT 1601 Introduction to Statistics...

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Unformatted text preview: STAT 1601: Introduction to Statistics, University of Minnesota-Mom's Quiz 2, 01800012 Name: Student ID: Problem 1. The number of sick days due to colds and ﬂu last year was recorded by a sample of 10 adults.Thedataare 510031565938 _ / (a) Compute Inter-quartile Range (IQR). (2 pts) ﬂ? ' £3: /’ on ’ f ’ ;:;__:.r.— J- .— ac, _.. Q! :11;- :.". (fa-H)-+—2.7f I 3 +11. I *4 3‘4): (9)" L7: = (“3+7"); ”in: It =9???) ' .-; ﬁzr—S’g (b) Please check whether there are outliers in the data by using IQR (2 pts) . ,h a o .3 (Army; no»; 6'), {.er€ I _ )4“ (3f N0 amt/7m .f .2}. + [Ix I J!- ; o M ----""""_.‘_.__‘__...__.- 6:2; 4 W M? 7 —-—-— W“ (e) Compute the sample standard deviation. (2 pts) Y : a"! a " a. J 3"! 9-5.9!) + (3-1244) 4- 4.27%- Problem 2. The scores of a certain statistics test approximately followed a normal distribution with mean .74 and standard deviation 8. Please use TABLE A in your textbook. “-‘w x. (34.904- —I- (Ir—\$9!) to —/ (a) What proportion of students scored above 90? (2 pts) {’(XPW =H”;’">ﬁ%¥£) ”or???“ 7- ﬂ(z 72.0):Q02wi-Ef‘ (b) What proportion of students scored between 66 and 82? (2 pts) / {’(56 (Yaw) = f(%;?f< 51g alas-#555” ”:5 T 2,3(_/_o(g</.') —- 594/9 -__.ud‘7 n— :ma“' Jaw} -- ...
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