A study on the relationship between the estriol levels of pregnant women and the birth weights of their children is given in the table. Here, x denotes estriol level, in mg/24 hr, and y denotes birth weight, in hectograms. Use the information to complete parts (a) through (d). 15 25 31 21 18 27 25 12 19 18 O 20 30 34 a. Decide whether finding a regression line for the data is reasonable. If so, then also do parts (b) - (d). O A. There is a linear pattern to the data, so it is appropriate to carry out a linear regression. O B. There is a clear nonlinear pattern to the data, so it is inappropriate to carry out a linear regression. OC. There is no linear pattern to the data, so it is inappropriate to carry out a linear regression. b. Compute the coefficient of determination, . Select the correct choice below and fill in any answer boxes within your choice. O A. 2- (Round to four decimal places as needed.) O B. It is not appropriate to carry out a linear regression. c. Determine the percentage of variation in the observed values of the response variable explained by the regression, and interpret your answer. Select the correct choice below and fill in any answer boxes within your choice. O A. % (Round to two decimal places as needed.) O B. It is not appropriate to carry out a linear regression. d. State how useful the regression equation appears to be for making predictions. O A. Very useful OB. Not useful Oc. Moderately useful O D. It is not reasonable to carry out a linear regression.

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Statements and Logic

Logic is the analysis of general patterns of thoughts without regard to any specific sense of context.