이07 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. 224689 Provided are the total seeds, seeds infected by the beetle, and percent of seeds infected for 28 velvetleaf plants. 3666778 40000336 Seeds 2450 2504 2114 I110 2137 8015 1623 1531 2008 1716 Infected 135 101 76 24 121 189 31 44 73 12 5157 Percent 5.5 4,0 3.6 2.2 5.7 2.4 1.9 2.9 3.6 0,7 Seeds 721 863 1136 2819 1911 2101 1051 218 1711 164 700 Infected 27 40 85 857 41 79 82 42 64 Percent 3.7 4.6 3.6 2.8 4.3 40 4.0 0.0 3.7 4.3 이0567 1006669 20024689 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 3778 4336 557 Do a complete analysis of the percent of seeds infected by the beetle. Include a 90% confidence interval for the mean percent infected in the population of all velvetlead plants. 6. 70 857 Pick the right stem plot SOLVE: Find the mean of the samples, k, and the standard distribution, s. (Enter your answers rounded to four decimal places.) 2079 324689 Give a 90% confidence interval for the mean percent infected in the population of all velvetleaf plants. 4666778 515577 6 0000336 O 221 1o 7.77 O 3.43 to 4,73 O 002 10 498 O 10.25 to 15.56 700 857 Find the degrees of freedom, df. (Enter your answer as a whole number.) 007 16667789 224689 CONCLUDE: Do you think that the beetle is very helpful in controlling the weod? df = 3 4 O The beetle infects very little of the seeds, so it is unlikely to be effective in controlling velvetleaf. 5157 60000336 700 857 Find the r" value for a 90% confidence interval for a. (Enter your answers rounded to three decimal places.) O There was not enough information to say if it is an effective treatment or not. O The beetle infects a large percentage of the seeds, so it is likely to be effective in controlling velvetleaf. O The beetle infects some of the seeds, so it is likely to have a moderate effect on controlling vehlvetleaf.