QUESTION 3 1 points Save Answer Adata set lists full IQ scores for a random sample of subjects with low lead levels in their blood and another random sample of subjects with high lead levels in their blood. The statistics are summarized below. Use a 0.05 significance level to test the claim that the mean IQ score of people with low lead levels is higher than the mean IQ score of people with high lead levels. Low Lead Level: n = 78 3; : 9238462 5 = 15.34451 High Lead Level: n = 21 ; = 86.90476 5 = 3933352 Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviation are equal. Test the given claim using the P- value method and critical value method. 0 Test statistic: t g 1 _027, critical value: I = 2_457, p va|ue O.Z, fail to reject HO 0 Test statistic: t = 1 .027, critical value: 2 =1.972 , P - value >0.'I, fail to reject HO 0 Test statistic: t g 2.282, critical value: 1 =1.725 , p value 0.10, fail to reject HO 0 Test statistic: t g 6371, critical value: I =1_761, P - value 0.4, fail to reject HO 0 Test statistic: :-1_238 , critical values: 1:.2571, P-value 0.27, fail to reject H. O Test statistic: t = 10.265 , critical value: t = 2.476. P- value 0.19, fail to reject H O Test statistic: t = 3.265 , critical value: t = 0.984, P - value >0.134, fail to reject H.QUESTION 5 1 points Save Answer Listed below are body temperatures of four subjects measured at two different times in a day: Body Temperature (F) at 8 AM on Day 1 98 97.0 98.6 97.4 Body Temperature (F) at 12 AM on Day 1 98 97.6 98.8 98.0 Assume that you want to use a 0.05 significance level to test the claim that the paired sample data come from a population for which the mean difference is u = 0 . Find , s , the t test statistic and the critical values. O d=0.35 OF, Sa = 0.15 OF, test statistic t = 1.379, critical values t = 12.436 O d=-0.35 OF, S = 0.72 .F, test statistic t = -1.243 , critical values t = $1.217 O d=0.30 OF, Sa = 0.17 OF, test statistic t = -0.864, critical values t = $1.325 O d=-0.35 OF, S = 0.30 OF, test statistic t = -2.333 , critical values t = 13.182 O d=0.42 OF, Sa = 0.28 OF, test statistic t = 3.422 , critical values t = 14.327QUESTION 6 1 points Save Answer Listed below are systolic blood pressure measurements (mm Hg) taken from the right and left arms of the same woman (based on data from "Consistency of Blood Pressure Differences Between the Left and Right Arms," by Eguchi, et al., Archives oflnternai Medicine, Vol. 167). Use a 0.01 significance level to test for a difference between the measurements from the two arms. What do you conclude? Assume that the paired sample data are simple random samples and that the differences have a distribution that is approximately normal. Right Arm 102 101 94 79 79 Left Arm 175 169 182 146 144 0 Test statistic: t : 2346, critical values: I = $1347, P - value >0:045, reject HO 0 Test statistic: t : 6592, critical values: I : $2964, P - value
