When birth weights were recorded for a simple random sample of 18

18 male babies born to mothers taking a special vitaminsupplement, the sample had a mean of 3.681

3.681 kilograms and a standard deviation of 0.661

0.661 kilogram. Use a 0.05 significance level to test the claim that the mean birth weight for all male babies of mothers given vitamins is different from 3.38

3.38 kilograms, which is the mean for the population of all males. Based on theseresults, does the vitamin supplement appear to have an effect on birthweight?

Formulate the null and alternative hypotheses. Choose the correct answer below.

Find the test statistic.

t=?

(Round to the nearest thousandth asneeded.)