STATE: Velvetleaf is a particularly annoying weed in corn fields. It produces lots of seeds, and the seeds wait in the soil for years until conditions are right. The velvetleaf seed beetle feeds on the seeds and might be a natural weed control. Provided are the total seeds, seeds infected by the beetle, and percent of seeds infected for 28 velvetleaf plants.
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Seeds & 2450 & 2504 & 2114 & 1110 & 2137 & 8015 & 1623 & 1531 & 2008 & 1716 \
Infected & 135 & 101 & 76 & 24 & 121 & 189 & 31 & 44 & 73 & 12 \
Percent & 5.5 & 4.0 & 3.6 & 2.2 & 5.7 & 2.4 & 1.9 & 2.9 & 3.6 & 0.7 \
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Seeds & 721 & 863 & 1136 & 2819 & 1911 & 2101 & 1051 & 218 & 1711 & 164 \
Infected & 27 & 40 & 41 & 79 & 82 & 85 & 42 & 0 & 64 & 7 \
Percent & 3.7 & 4.6 & 3.6 & 2.8 & 4.3 & 4.0 & 4.0 & 0.0 & 3.7 & 4.3 \
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Seeds & 2228 & 363 & 5973 & 1050 & 1961 & 1809 & 130 & 880 & & \
Infected & 156 & 31 & 240 & 91 & 137 & 92 & 5 & 23 & & \
Percent & 7.0 & 8.5 & 4.0 & 8.7 & 7.0 & 5.1 & 3.8 & 2.6 & & \
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To access the complete data set, click the link for your preferred software format:
Excel Minitab JMP SPSS R Mac-TXT-PC TXT CSV Crunch
Find the mean of a sample's mean and the standard distribution. Make it four decimal places.
Second question: Find the T value for a 90% confidence interval for population mean. Put three decimal places.
