Statistics

E-Text Exercises Latasha Bell University of Phoenix Olivia Scott April 24, 2012 9.54 Faced with rising tele telefax costs, a firm issued a guideline that transmission of 10 pages or more should be sent by 2-day get out instead. Exceptions argon allowed, but they foreshadow for the average to be 10 or below. The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample spurious 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 fine esteem for one-tail test with alpha=1% and df=34 is 2.3263 sample statistic: t(14.44) = (14.44-10)/[4.45/(sqrt35)] = 5.9028 (b) function 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 overweight evidence for rejecting Ho and backup Ha. 9.56 A fall was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the light upon influenceed toward heads? Show your decision predominate 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 give it. P (2.065 < z < 10) = 0.019. The probability the test results could have produced veritable(a) stronger evidence of the coins bias towards heads is 0.019. 9.62 The Web-based community Oh Baby! Gifts has a remainder of processing 95 percent of its orders on the very(prenominal) day they ar received. If 485 out(a) of the next cholecalciferol orders are processed on the corresponding day, would this prove that they are transcend 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 attendant reviewed 25 oral numerical operation insurance claims from a particular surgical office,...If you emergency to detect a large essay, order it on our website: Orderessay

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