Velvetleaf is a particularly annoying weed in cornfields. It produces lots of seeds, and the seeds wait in the soil for years until the conditions are right. The velvetleaf seed beetle feeds on the seeds and might be natural weed control. The total seeds, seeds consumed by the beetle, and percentage of seeds consumed for28 velvetleafplants are given in thetable.

Find the sample mean,????,and the sample standard deviation,?.Give your answers to four decimal places.

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Find the??value for a90%confidence interval for?.Give your answer to three decimal places.

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A B C 1 Seeds Infected Percent 2 2450 135 5.5 3 2504 101 4 4 2114 76 3.6 5 1110 24 2.2 6 2137 121 5.7 7 8015 189 2.4 8 1623 31 1.9 9 1531 44 2.9 10 2008 73 3.6 11 1716 12 0.7 12 721 27 3.7 13 863 40 4.6 14 1136 41 3.6 15 2819 79 2.8 16 1911 82 4.3 17 2101 85 4 18 1051 42 4 19 218 0 20 1711 64 3.7 21 164 7 4.3 22 2228 156 7 23 363 31 8.5 24 5973 240 4 25 1050 91 8.7 26 1961 137 7 27 1809 92 5.1 28 130 5 3.8 29 880 23 2.6A B C D Subj Right Left 2 113 137 3 2 105 105 4 3 130 133 5 4 101 108 5 138 115 6 118 170 8 7 87 103 LO 8 116 145 10 9 75 78 11 10 96 107 12 11 122 84 13 12 103 148 14 13 116 147 15 14 107 87 16 15 118 166 17 16 103 146 18 17 111 123 19 18 104 135 20 19 111 112 21 20 89 93 22 21 78 76 23 22 100 116 24 23 89 78 25 24 85 101 26 25 88 123 27 28