Confidence level | Critical value 0.90 2* = 1.645 0.95 = 1.960 0.99 2* = 2.576 388282.2542864.qx3zqy7 Jump to level 1 A biologist wants to know the highest likely proportion of squirrels in the area that are infected with a particular disease. A random sample of 100 squirrels was tested. Use Sheet 8 of the Excel file linked above to calculate p and the 95% confidence interval. p = Ex: 1.234 + Upper bound for 95% confidence interval = Ex: 1.234 Lower bound for 95% confidence interval = The biologist can say with 95% confidence that the true population proportion of the local squirrel population that is infected with the disease is in the interval [ Ex: 1.234 , Ex: 1.234 The highest likely proportion is Ex: 1.234Infected Yes 3 No 4 No 5 No 6 Yes 7 No No 9 Yes 10 No 11 Yes 12 No 13 No 14 No 15 No 16 No 17 No 18 No 19 Yes 20 No 21 No 22 No 23 No 24 Yes 25 No 26 No 27 No 28 No 29 No 30 No 31 No 32 No 33 No 34 No 35 No 36 Yes 37 No 38 Yes 39 No 40 Yes 41 No 42 No 43 No 44 No 45 No 46 No 47 No 48 No 49 No 50 No 51 No 52 No 53 No 54 Yes 55 Yes56 No 57 No 58 Yes 59 No 60 No 61 No 62 No 63 No 64 No 65 No 66 No 67 No 68 No 69 No 70 No 71 No 72 No 73 No 74 No 75 No 76 No 77 No 78 Yes 79 No 80 No 81 No 82 Yes 83 Yes 84 No 85 No 86 No 87 No 88 No 89 No 90 No 91 No 92 Yes 93 Yes 94 No 95 No 96 No 97 No 98 Yes 99 Yes 100 No 101 No