What is this expression in simplest form? 1
25224 -
-
OA.
-
O B.
-
4. – 7
2:( - 2)
-1
2:( - 2)
-41 + 9
21(1 – 2)
-3.1 8
21(- 2)
O C.
-
OD.
-

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.