☑Kizspy.me
(Choose 1 answer)
(See picture)
☐ A
A. (0.789. 1.449)
B. (0.627, 1.613)
C. None of the other choices is correct
☐ E
D. (0.622, 1.618)
E. (0.742. 1.498)
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FUO.sh
the exam.
The diameter of steel rods manufactured on two different
extrusion machines is being investigated. Two random samples
of sizes n₁ =12 and n = 10 are selected, and the sample means
and sample variances are 9.25, 0.4, x = 8.13, and
$2=0.5. Assume that both populations are normally distributed
with the same variance. Find a 90% two-sided confidence
interval for the difference in the two population means.
Let
=0.05 = 1.645, =0.1 = 1.281, 0.05, 20 = 1.725, 10.1,20 =1.325
