Question 1 1.5 pts While performing a hypothesis test comparing two populations, if the population standard deviations are not available, which of the following is true? If the p-value is greater than alpha, the null hypothesis will be rejected A z-score is calculated to determine the conclusion The sample sizes must be below 30, and both populations must not be normally distributed The sample standard deviation is used instead, along with t-distribution Question 2 1.5 pts If the confidence interval of the difference between two means does NOT include zero, what does that mean? The mean of population 2 is greater than the mean of population 1 There is a difference between the two population means There is no difference between the two population means The mean of population 1 is greater than the mean of population 2