t View History Bookmarks Window Help STA 2023 Elementary Statistics Class Number
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t View History Bookmarks Window Help STA 2023 Elementary Statistics Class Number: 08475 lorenzo tones 12g17 1254 uiz:Chapter 10 Review Quiz 00:51:09 Submit This Question: 1 p 40f 4 R complete) This Quiz: 4 pts pos Suppose IQ scores were obtained from randomly selected twins. For 20 such pairs of people, the linear correlation coefficient is 0.907 and the equation of the regression line is y-15.46+1.14x, where x represents the IQ score of the twin bom first. ANlso, the 20 x values have a mean of 97 82 and the 20 y values have a mean of 95.8.What is the best predicted IQ of the twin bom second, given that the twin born irst has an IQ of 107? Use a significance level of 0.05 Click the locn to view te critical values of the Pearson correlation coefdent r. The best predicted 1O of the twin bom second is (Round to two decimal places as needed.) Enter your answer in the er box. 11.59pm 2/00/17 Review Final Exam 2 3 4 5 6 8 WERTYU 0Explanation / Answer
here for 0.05 level and (n-2=18) degree of freedom critical value of r =0.4438
as correlation coefficient is greater than critical value ; we can conclude that regression model is significant.
from above equation predicted value =-15.46+1.14*107=106.52
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