G13.3

Smoking and birth weight.Exercise 13.1 presented data on birth weights of infants based on the smoking status of mothers. Table 13.3 lists the data. Descriptive statistics are shown in Table 13.10. Conduct an ANOVA on these data, showing all steps.

613.3 ASSUMPTIONS HYPOTHESES: H0: Ha: 5mm OUTPUT: - W Height group Analysis of Variance Source SS df Ms E Prob ) F Between groups 12.2887991 3 4.09626636 3.26 0.0417 Within groups 26.364317? 21 1.255443? Total 33.6531168 24 1.61054653 RESULTS: INTERPREI': CONCLUSION: OR USE: mow hirtnweioht. group Number of ch: = 25 Rsquared 0.3183 Root ESE = 1.11997 Adj Esquared = 0.2210 Source Partial 55 d1 Ms E Prob)? node]. 12.301383 3 4.1001611 3.27 0.0415 group 12.301383 3 1!.1004611 3.27 0.04.15 Residual 26.34101? 21 1.2543341 Total 38.6424 21 1.6101