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.. ._ v ._ Quizl.__._AB..Statistics Name;__ _. Suppose you administer . .. rtain aptitude test to a random samle a dents in your school, and that the average score is lﬁ We want to dete 'ne th n the population all student in
6. @ /Q t: the test. Inggtence I. What is the upper r a 98% conﬁdence interval? (Show the key numbers in the sketch of the distribution.) the school. ' Assume a standard deviation 0 WW (score) 2. Explain the meaning of “98% conﬁdent.” I F  I I i i 2
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a] M (q. 4. I Calculate a 98% conﬁdence interval for the mean score u for the whole school. Follow the
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T Quiz 10.1A Chapter 10 O uiz 10 .2A Statistics At the bake : re on work, loaves of bread are suppoed t weigh 1 pound ‘ 'th standard
deviatio a 0 = 0.13 poun 3 You believe that new personnel are pro  ucing loaves that ar
than 1 pound. As' supervisor of Quality Control, you want to test your hypotheses at signiﬁcance level. You weigh 20 loaves and obtain a mean weight of 1.05 pounds. ._...—"’ m Zjéﬁwfﬁi’QJﬁ mem 5; “mime” 7’
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H0 J’ﬁ a hm @WMWM >Hé 2. Identify the statistical proogd/ﬁ’r/e you shoi'ild C. _.en; state" and verify the c nditions required
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1. Identify the population and paramete of ' terest. State your null and alte tive hypotheses. in.”
/§ % 3. Calculate the test statistic and the Pvalue. Illustrate using the 2; [.05—1 graph provided. 4. State your conclusions clearly in complete sentences.
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0J3 , ._ Q“iZ 103A . . ..,..,,.Name.:. .1 3 . Read the brief neWSpaper article on using a depression pill to help smokers quit.‘ Depression Pill Seems to Help Smokers Quit
BOSTON — Taking an antidepression medicine appears to double sm’okers’
chances of kicking the habit, a study found. The Food and Drug Administration
approved the marketing of this medicine, called Zyban or bupropion, to help
smokers in May. The results of several studies with the drug, including one
published in today’s issue of the New England Journal of Medicine, Jere m de public then. . . The newly published study was conducted 0 _ 615 volunteer ho wanaetd to
give up smoking and were not outwardly depresse.  00 either Zyban or dummy pills for 6 weeks. A year Rig percent of those getting Zyban were still off cigarettes, compared with 12 cent in the comarison group. ! ' ‘5 .. A
l. The results of this experime , ere signiﬁcant at the 0!. = .05 signiﬁcance level. In your
opinion, are the resulgﬂiﬁcant? Justify Your position. Vol unwzﬂx
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signiﬁcance level or calculating a P—value. hich approach is taken? 1139, 5/
describe the circumstances when one should use each approach. 1. ﬂ) ' {ﬁg “%
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EUWTEF... [)4 P213944 d P:,000cwc9l Chapter 10 Quiz 10.3A Quiz 10.4A AP Statistics 7 Name: ' 5 An agricultural eld trial compares the yield 0&6. varieties of tomato Er commercial use. The
researchers divide in half each of 10 small plots of land in different locations and plant each tomato variety on one half of each plot. After harvest, they compare the yields in pounds per plant at each ’
location. T = ‘ O 34. Assu e a popula 'on standard ' ~. 'tyAm 'etyB)giveJ'c=
deviation f 0 . . W I1
e s, We want to determine if there is a difference in the mean yi our null h pothesis is that
there is no difference in the mean 'elds, i.e., Hof ,u = 0. Ha: y at 0. We asked, “Is there cy/convincing evidence at th 5% siﬁcance leve _ at the mean yield of tomatoes is different from
‘ p a 0?” A signiﬁcance test to answer (“2/ and the Pvalue is 0.1952. 0d =_.0§_ 1. Describe what a Type I error would be in this situation. T I‘SQQLW: acme , 735m \Hu H0: =0. be
5&1 y Frat/£0005 “a CMC. JMEO WHA Liz/tan we Sinai/9 ﬂat) 7 I iaI suspect that the large Pvalue is due t6 10w 3
‘ ct a mean difference in yield of 0.5 pound per p ant at robability of a Type II error when in fact p = 0.5. alternative ,u = 0.5. 2. Calculate the probability of a Type I error for this problem. 4. If the sample size is increased to n = 25 plots of land, what will be the power against the e . j ’,
alternative? .13 ( J E z a I Elm/matey '3 ‘3‘“ 053 i
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This note was uploaded on 05/01/2011 for the course AP CLASSES 101 taught by Professor Mr.smith during the Spring '11 term at Korea Advanced Institute of Science and Technology.
 Spring '11
 MR.Smith

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