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Math 147 QUIZ 13 (TUESDAY) Name It 1”” Section N X I; 1. (2 pts) ‘ g h‘ I
(a) The M hypothesis says that the sample difference is just due to chance; the N hypothesis
says that the sample difference points to a real difference.
(b) A test statistics is used to measure the difference between the data and what is expected on the n (xi/LA hypothesis
2. (2 pts) /
(a) T @The PValue of a test is the chance of getting a big test statistic, assuming that the null C ,
hypothesis to be right. P isAthe chance of the null hypothesis being right. 194% I) ~ (c)@ F If P is less that 5 %, the result is called statistically significant. 3.(6 pts)
A coin is tossed 10,000 times, and it lands 5,167 times. Is the chance of heads equal to 50%? Or are
there too many heads for that? Q: Formulate the null and alternative hypotheses in terms of a box model and compute Z. (ﬂies. m P: #f) (fifth WWW; “1" F4454) H9 : rfrm‘beevx : ~1— 3 ‘W' 7 1 7—
, Ho (nmii ﬁrtgyatiests)
z ; MW :‘ $34 3 :ng 11’” L123}
(/0000 X “'2‘ Z a ‘IWW 61%.
W5, qoﬂtz‘lg .
1) : Z Z :1 O 04’ D < 52 reject H. Time Me 470% WW1 15¢ng 750 aria/«AA w: (flea/1% VﬁvH‘Wt, ...
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 Spring '07
 Klimko

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