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One way ANOVA was used because the researcher needed to compare means between the six smoking groups. Because one way ANOVA is used for comparing more than 2 means.2.The population mean pulmonary function is equal across all smoking groups. Generally null hypothesis states that all means are equal.3.For Kolmogorov -Smirnov test, hypothesis are, \mathrm{H}_{0} : The data follows normal distribution.\mathrm{H}_{\mathrm{a}} : The data does not follow normal distribution.P-value for non-inhaling smokers is 0.000 , since p-value is less than 0.05 , we reject null hypothesis and conclude that noninhaling smokers group violate normality assumption.4.Hypothesis for Levene test:\mathrm{H}_{0} : All groups have equal variance.\mathrm{H}_{\mathrm{a}} : Group variances are not equal.No, as the p-value of the Levene's test <0.05.we reject null hypothesis.5.No.Because \mathrm{p}-value is greater than 0.05 for both Bonferroni and Dunnett test. ...