Statistics

E-Text Exercises Latasha Bell University of Phoenix Olivia Scott April 24, 2012 9.54 Faced with rising autotype costs, a firm issued a guideline that transmission of 10 pages or more should be sent by 2-day get out instead. Exceptions be allowed, but they withdraw for the average to be 10 or below. The firm examined 35 randomly chosen facsimile transmissions during the next year, yielding a sample imagine of 14.44 with a standard deviation of 4.45 pages. (a) At the .01 level of significance, is the true mean greater than 10? Ho: mu = 10 Ha: mu > 10 circumstantial judge for one-tail test with alpha=1% and df=34 is 2.3263 campaign statistic: t(14.44) = (14.44-10)/[4.45/(sqrt35)] = 5.9028 (b) purpose Excel to find the right-tail p-value. P-value = P(5.9028 < t < 10) = 0.00000057579... Since the p-value is so much littler than 1% this is very heavy evidence for rejecting Ho and supporting Ha. 9.56 A fall was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the gold influenceed toward heads? Show your decision get and calculations. Yes. p-hat = x/n = 38/60 = 19/30 Ho: p = 1/2 Ha: p > 1/2 Critical value: z = 1.28 Test statistic: z(19/30) = (0.633333-0.5)/sqrt[(.5)(.

5)/60] (b) Calculate a p-value and figure it. P (2.065 < z < 10) = 0.019. The fortune the test results could have produced heretofore stronger evidence of the coins bias towards heads is 0.019. 9.62 The Web-based gild Oh Baby! Gifts has a cultivation of processing 95 part of its orders on the very(prenominal) day they are received. If 485 out(a) of the next euchre orders are processed on the comparable day, would this prove that they are stupendous their goal, using ? = .025? (See story.news.yahoo.com accessed (June 25, 2004.) Ho: p = 0.95 Ha: p > 0.95 p-hat = 485/500 = 0.97 Critical value for one-tail z test with alpha = 0.025 = 1.96 9.64 An listener reviewed 25 oral numerical operation insurance claims from a particular surgical office,...If you emergency to detect a rise essay, order it on our website: Ordercustompaper.com

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