An experiment examines number of premature babies based on maternal smoking status. The researchers run a chi-squared hypothesis test to see if mothers who smoke are more likely to have premature children. The chi-squared test statistic works out to be 5.24. Can you reject the null hypothesis?

a.

No, we fail to reject the null hypothesis. We find evidence that there is no difference between mothers who smoke and mothers who do not smoke in terms of number of premature births.

b.

Not enough information. We need to know the p-value.

c.

Yes, you can reject the null hypothesis. We find evidence that mothers who smoke have statistically significantly more premature births.

d.

Yes, you can reject the null hypothesis. We find evidence that mothers who do notsmoke have statistically significantly more premature births.