B C D E F G H J K L M N Test of Difference Between Uncorrelated Mean X1 - X2 10 Sd 2 + Sd22 11 N1 N2 12 13 14 Where X 1 = mean of the first group 15 X2 = mean of the second group 16 17 Sd 12 = variance of the first group 18 Sd 22 = variance of the second group 19 N1 = population of the first group 20 2 = population of the second group 21 22 Df = n' +n2- 2 23 24 25 26 Sample computation 27 Given Mean of the first group 78 28 Mean of the second group 76 29 variance of the first group 30 30 variance of the second group 25 31 NT 45 32 N2 35 33 34 78-76 2 35 30/45 0.666666667 36 25/35 0.714285714 37 1.380952381 (add . 714285714 and 1.380952381) 38 V 1.3809 1. 175117015 39 2/1.175117 1.701968326 compare the computed value with valuesin T table (our Table B) 40 41 42 Solve the following 43 Test of difference: 44 45 1 Seven samples of individuals were selected randomly from the two (2) communities. The ages of the persons were tabulated 46 Com A Com B 47 65 45 48 43 30 49 25 22 50 60 47 33 50 Is there significant difference in their ages? Use alpha .05 2 The barangay health unit wanted to allocate the available emergency health care services with expected demand for emergency services among the residents of The number of emergency need per zone was tabulated as follows Bray A Brgy B 12 16 17 10 31 13 11 18 15 66 16 15 67 7 9 14 11 31 23 At a .05, if there is significant difference in the allocation of available emergency health care services 3 The resting heart rates were measured in a sample of women smokers and non smokers at a state university. Here were 14 smokers and 18 nonsmokers in the 74 Was there a significant difference in the resting rates of the two groups. Use alpha = .05, two tailed test. 75 76 Smokers Non smokers 77 82 78 62 79 85 80 8 8 89 8 8 68 86 64 84 76 66 96 69 87 80 82 Please try to solve and submit within the day Nov. 12 We shall have asynchronous today applications of the lessons we had in our previous discussion. Try to solve without my assist ance by merely following the sample computation. 96 We have formula for computation of mean, variance, how to solve square root 97 Thank you 98 99 100 101 102 103 104 105 106 formula Sheet2 O