Question: A study was conducted to determine whether and expectant mother=s smoking has any effects on bone mineral content of her otherwise healthy child. A sample of 77 newborns whose mothers smoked has a mean of 0.089 g/cm and a standard deviation of 0.026g/cm. A sample of 161 infants whose mothers did not smokes had a mean of 0.095g/cm and a standard deviation of 0.025g/cm. Assume that the underlying population variances are equal.

Are the two samples of data paired or independent?

State the null and alternative hypothesis?

Conduct the test at the 0.05 level of significance. What is your conclusion?