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Unformatted text preview: 8. t=rsqrt(n2)/sqrt(1r^2) t=(0.46)sqrt(13)/(1(0.46)^2) t=(0.46)(3.605551)/0.887919 t=1.8679 With a significance level of 0.05, and 13 degrees of freedom, the critical t for a onetailed test is 1.7711.8679<1.771 Therefore, we reject the null hypothesis and conclude p < 0 10. 14. The 8 xy pairs are: (5,13); (3,15); (6,7); (3,12); (4,13); (4,11); (6,9); (8,5) The equation for linear regression is given by: y = ax + b where "a" is determined from: a = [(xy)N  (x)(y)]/[(x)N  (x)] and "b" is determined from: b = [(x)(y)  (x)(xy)]/[(x)N  (x)] where: x = 39 x = 211 y = 85 xy = 378 N = 8 Therefore: a = [(378)(8)  (39)(85)]/[(211)(8)  (39)] = 291/167 = 1.742515 b = [(211)(85)  (39)(378)]/[(211)(8)  (39)] = 3,193/167 = 19.119760 Thus, the equation is: y = (1.742515)x + 19.119760 For x = 6: y = (1.742515)(6) + 19.119760 = 8.665...
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 Spring '11
 SANJEEV
 Statistics

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