(Choose 1 answer)
(See picture)
A. 0.987
B. 1.734
C. 1.976
D. 0.673
Checking the lengths (cm) of randomly selected products from two manufacturing plants, we get the following data:
n_{1}=26 n_{2}=23 \overline{x}_{1}=6.9 \overline{x}_{2}=7.2 s_{1}=1.26 s_{2}=1.76.
Assume that the variances are equal, what is the width of the 95% confidence interval on the difference in population mean lengths?
Let 0.05,47 = 1.68; 0.025,47 = 2.
El 48
