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16 6.125 1.668 3 5 6 7 9
n mean SD min q1 med q3 max
xhat = 7.3 Sx = 1.494 n = 10 h0 : Ms = Mc ha : Ms != Mc
sig level : 0.05 statistic : xhat1 - xhat2 = 7.3 - 6.125 = 1.175 2 sample t test for difference in means parameter: the true difference in mean amoun of sleep between ap stats students and ap calc students
Check: random good 10% 10 students are less than 10% of all ap stats students 10% 16 students are less than 10% of all ap calc sutdents normal : no strong skew or outliers
SE m1 - m2 =
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