Which of the following is equivalent to dividing by 2? Subtract by 2
Add by 4
Multiply by 2
None of the above
Multiply by 2

Which statements are true? see picture

Are you guys willing to me with these last 8 questions on my homework for math reply to this question that i posted

Summary statistics given for independent simple random samples from two populations. use the pooled t-interval procedure to obtain specified confidence interval. x1=71.6, s1=3.9, n1=11, x2=67.9, s2=3.4, n2=9 determine a 99% confidence level.