fall08quiz13 - Math 147 QUIZ 13(TUESDAY Name It 1””...

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Unformatted text preview: 05/06/08 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 P-Value 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‘W-t, ...
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