Please help in answering these True and False questions.

Question 4

If a 95% CI for the difference in two independent means is (-4.5 to 2.1), then the point estimate is -2.1. True

False

Question 5

If a 95% CI for the difference in two independent means is (2.1 to 4.5), there is no significant difference in means.

True

False

Question 6

If a 90% CI for the mean is (75.3 to 80.9), we would reject the null hypothesis that the mean = 70 in favor of the hypothesis that the mean is not equal to 70 at a significance level of 0.05.

True or False