Are mothers who smoke during pregnancy more likely to have low birth weight (<2500grams) infants compared to mothers who do not smoke during pregnancy?

State you null and alternative hypothesis:

Ho: p1 - p2 = 0 (p1 = p2)

Ha:p1 - p2 0 (p1 p2)

Would it be appropriate to conduct a "large sample" z test?

Test this hypothesis using SPSS:

ANALYZEDESCRIPTIVESCROSSTABS

move the variable "smoked during pregnancy (smoke)" to area under "Row(s)"

move the variable "Low birthweight infant (low)" to the area under "Column(s)"

request Row percentages under Cells option

request Chi-square under Statistics optionClick "OK"