Question 1 1 pts You would like to test if the change in global sea surface temperature from pre-industrial level to current level is zero. Given a sample of annual temperatures, you conduct a test with the null hypothesis that the mean change is zero. From this sample, you compute a sample variance of temperature changes. Without any calculation, is it more or less likely to reject the null when you know the population variance of temperature changes (which happens to be equals the sample variance) compared to the case when you don't know it? O It is more likely to reject if the population variance is known. O It is less likely to reject if the population variance is known. O They are equally likely, because population variance happens to be equal to the sample variance. There is not enough information, because we don't know the value of population mean