The two dot plots below compare the forearm lengths of two groups of schoolchildren: two dot plots are shown one below the other. the title for the top dot plot is forearm length, group x and the title for the bottom plot is forearm length, group y. below the line for each dot plot is written length in inches. there are markings from 10 to 13 on each line at intervals of one. for the top line there are 4 dots above the first mark, 4 dots above the second mark, and 2 dots above the third mark. for the bottom line there are 2 dots above the second mark, 2 dots above the third mark, and 6 dots above the fourth mark. based on the visual inspection of the dot plots, which group appears to have the longer average forearm length? group x, because no child in the group has a forearm length longer than 12 inches. group x, because four children in the group have the least forearm length of 10 inches. group y, because a child in the group has the least forearm length of 10 inches. group y, because six children have a forearm length longer than 12 inches.

Listed below are time intervals (min) between eruptions of a geyser. assume that the "recent" times are within the past few years, the "past" times are from around 20 years ago, and that the two samples are independent simple random samples selected from normally distributed populations. do not assume that the population standard deviations are equal. does it appear that the mean time interval has changed? is the conclusion affected by whether the significance level is 0.10 or 0.01? recent 78 90 90 79 57 101 62 87 71 87 81 84 57 80 74 103 62 past 88 89 93 94 65 85 85 92 87 91 89 91 follow the steps of hypothesis testing, including identifying the alternative and null hypothesis, calculating the test statistic, finding the p-value, and making a conclusions about the null hypothesis and a final conclusion that addresses the original claim. use a significance level of 0.10. is the conclusion affected by whether the significance level is 0.10 or 0.01? answer choices below: a) yes, the conclusion is affected by the significance level because h0 is rejected when the significance level is 0.01 but is not rejected when the significance level is 0.10. b) no, the conclusion is not affected by the significance level because h0 is not rejected regardless of whether a significance level of 0.10 or 0.01 is used. c) yes, the conclusion is affected by the significance level because h0 is rejected when the significance level is 0.10 but is not rejected when the significance level is 0.01. d) no, the conclusion is not affected by the significance level because h0 is rejected regardless of whether a significance level of 0.10 or 0.01 is used.