Verbal IQ Scores Example in this section used performance

Solution 7 BSC Step 1: From the given information the data are verbal IQ scores based on the sex and the blood lead level. The data is divided into two factors namely, the sex and blood lead level. If the given sample data is used to infer about the verbal IQ scores based on sex and the blood lead level, the following conditions should met. (i) For each cell, the sample values appear to be from an approximately normally distributed population. (ii) It is assumed that, the population variances are same, as the standard deviations of the three samples are not significantly different. (iii) Based on the careful design of the study, the given samples are treated as simple random samples. (iv) The samples are independent to each other, as the subjects are not matched in any way. (v) The three samples are drawn from the populations which are categorized according to sex and blood lead level. (vi) All of the cells have the same number of sample values. Thus the assumptions are reasonable and the conditions are satisfied. Hence, in this case two way analysis of variance is used.