Stat211 exam2 - A[A'~ V a ‘1 r Statistics 211 Examz 3 b...

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Unformatted text preview: // A [A '~ V, a ‘1 r ' \ Statistics 211 _ Examz 3 b Nam: - . ‘ ' ‘ \Om a Summer 96 Smidt i \pgase prmt _ l 1. For the following numerical variables, state whether each 1s discrete or continuous. (8) 2 13% Q» a. The time required to complete a phone call to a prospective client. ; b. The number of calls to the client. 0 c. The number of articles purchased by the client. I d The shipping weight of the articles. a. The number of successful surgeries, of all type 5. among the next ten performed at General Hospital. =2; b. The number of doubles in twenty rolls of two dice. i c. The number of spades in five cards taken without replacement flom a well shuffled deck. d The number of classes a Cal Poly student drops before graduating. :. \ Indicate whether each of the following are binomial(B) or non-binomial(N) random variables. (8) 3. Many manufacturers have quality control programs that include inspection of incomm materials for defects. Suppose that a computer manufacturer receives computer boardslig lots of fly .Two boards are .1. mwmuuw— V. CW) r" Us if g A \ Q :‘r The table below contain the probability distribution for x = the number of potential suicide calls received per day by a crisis intervention hotline. a. b. Calculate the mean and the variance of x. (10) ‘ y (4 L V i A" A‘ " V _ I". .f i ‘» ‘ '/ ' i W." 1! \z’ :3) i, Mk ix “3' L: “a" ‘5': ‘_ Li: ' 5‘ (f ._) L. {AV-‘1}: 3 » i‘ \ W3} .‘1 \V\ kw 1 ¥ K ! 1‘ 1"» fl ' .V \ V , ‘ ‘ ,»"'\ E .. 2 (2‘ :1 ll ‘1 ./ l &U\N& —.' W """ ‘ :1": ”T" I Ll + l V.) V. L; ’M” f: ' “Lg . .. .1; l' I i (Y. l “V i ‘ 'o’l;3.fi _\ i v57 :w. _’< = “l (, ~ m m .L- .; ~ Vr a .. V 4 .. :. 0‘ W l I‘. Jklf’é‘ui‘g Ii, 1,. ‘-. v VV. _ Ari ”’1; «gill/l 1 1pc: . ...
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