Independent samples are obtained from two normal populations with equal variances in order to 1.0 Points construct a confidence interval estimate for the difference between the population means. If the first sample contains 16 items and the second sample contains 36 items, the correct form to use for the sampling distribution is the . O A. A. normal distribution . O B. B. t distribution with 15 degrees of freedom . O C. C. t distribution with 35 degrees of freedom . V O D. D. t distribution with 50 degrees of freedom