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barcode font reporting services Tests of Hypotheses and Significance in Software
CHAPTER 7 Tests of Hypotheses and Significance QR Code Reader In None Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications. Create QR In None Using Barcode encoder for Software Control to generate, create QR Code ISO/IEC18004 image in Software applications. Coefficient of contingency
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EAN13 Generator In None Using Barcode drawer for Software Control to generate, create EAN13 image in Software applications. Encode Code 39 Full ASCII In None Using Barcode generation for Software Control to generate, create Code39 image in Software applications. 7.119. Two urns, A and B, contain equal numbers of marbles, but the proportions of red and white marbles in each of the urns is unknown. A sample of 50 marbles selected with replacement from each of the urns revealed 32 red marbles from A and 23 red marbles from B. Using a significance level of 0.05, test the hypothesis that (a) the two urns have equal proportions of marbles and (b) A has a greater proportion of red marbles than B. 7.120. Referring to Problem 7.54, find the least number of questions a student must answer correctly before the instructor is sure at a significance level of (a) 0.05, (b) 0.01, (c) 0.001, (d) 0.06 that the student is not merely guessing. Discuss the results. 7.121. A coin that is tossed 8 times comes up heads 7 times. Can we reject the hypothesis that the coin is fair at a significance level of (a) 0.05 (b) 0.10 (c) 0.01 Use a twotailed test. 7.122. The percentage of A s given in a physics course at a certain university over a long period of time was 10%. During one particular term there were 40 A s in a group of 300 students. Test the significance of this result at a level of (a) 0.05, (b) 0.01. 7.123. Using brand A gasoline, the mean number of miles per gallon traveled by 5 similar automobiles under identical conditions was 22.6 with a standard deviation of 0.48. Using brand B, the mean number was 21.4 with a standard deviation of 0.54. Choosing a significance level of 0.05, investigate whether brand A is really better than brand B in providing more mileage to the gallon. 7.124. In Problem 7.123 is there greater variability in miles per gallon using brand B than there is using brand A Explain. ECC200 Printer In None Using Barcode creator for Software Control to generate, create Data Matrix 2d barcode image in Software applications. Barcode Printer In None Using Barcode maker for Software Control to generate, create bar code image in Software applications. ANSWERS TO SUPPLEMENTARY PROBLEMS
Make RoyalMail4SCC In None Using Barcode maker for Software Control to generate, create RoyalMail4SCC image in Software applications. Generating EAN 13 In ObjectiveC Using Barcode generator for iPhone Control to generate, create EAN13 image in iPhone applications. 7.63. (a) 0.2606. 7.64. (a) Accept the hypothesis if between 22 and 42 red marbles are drawn; reject it otherwise. (b) 0.99. (c) Accept the hypothesis if between 24 and 40 red marbles are drawn; reject it otherwise. UPCA Recognizer In VB.NET Using Barcode reader for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications. Bar Code Printer In None Using Barcode generation for Office Excel Control to generate, create bar code image in Microsoft Excel applications. CHAPTER 7 Tests of Hypotheses and Significance
Draw UPCA In Java Using Barcode generation for Android Control to generate, create UPCA Supplement 5 image in Android applications. UPCA Supplement 2 Decoder In C# Using Barcode reader for VS .NET Control to read, scan read, scan image in VS .NET applications. 7.65. (a) (H0: p 0.5), (H1: p 0.5). (b) Onetailed test. (c) Reject H0 if more than 39 red marbles are drawn, and accept it otherwise (or withhold decision). (d) Reject H0 if more than 41 red marbles are drawn, and accept it otherwise (or withhold decision). 7.66. (a) We cannot reject the hypothesis at a 0.05 level. (b) We can reject the hypothesis at a 0.05 level. 7.67. We cannot reject the hypothesis at a 0.01 level in either (a) or (b). 7.68. We can reject the claim at both levels using a onetailed test. 7.69. Yes, at both levels, using a onetailed test in each case. 7.70. The result is significant at a 0.05 level in both a onetailed and twotailed test. 7.71. The result is significant at a 0.01 level in a onetailed test but not in a twotailed test. 7.72. (a) Yes. (b) No. 7.73. A onetailed test at both levels of significance shows that brand B is superior to brand A. 7.74. A onetailed test shows that the difference is significant at a 0.05 level but not a 0.01 level. 7.75. A onetailed test shows that the new fertilizer is superior at both levels of significance. 7.76. (a) A twotailed test shows no difference in quality of performance at a 0.05 level. (b) A onetailed test shows that B is not performing better than A at a 0.05 level. 7.77. A twotailed test shows that there is no evidence at either level that the mean lifetime has changed. 7.78. A onetailed test indicates no decrease in the mean at either the 0.05 or 0.01 level. 7.79. A twotailed test at both levels shows that the product does not meet specifications. 7.80. A onetailed test at both levels shows that the mean copper content is higher than specifications require. 7.81. A onetailed test shows that the process should not be introduced if the significance level adopted is 0.01 but should be introduced if the significance level adopted is 0.05. 7.82. Using a twotailed test at a 0.05 level of significance, we would not conclude that there is a difference in acidity. 7.83. Using a onetailed test at a 0.05 level of significance, we would conclude that the first group is not superior to the second. 7.84. The apparent increase in variability is not significant at either level. Code 128C Decoder In None Using Barcode scanner for Software Control to read, scan read, scan image in Software applications. UPCA Creation In VB.NET Using Barcode encoder for VS .NET Control to generate, create UPCA image in Visual Studio .NET applications. 
