Page 8 - Midterm Exam Questions

26.04.2020 M dterm Make-up

14. Suppose x s a un form random var able w th c = 10 and d = 60 . F nd the standard dev at on of x.

A. σ = 20.207
B. σ = 2.041

C. σ = 2.415
D. σ = 14.434

15. 3 2 3 1 1 4
Compute s 2 and s for the data set: , , , , , . Round to the nearest thousandth.
10 5 10 5 2 5

A. 1.208 ; 1.099
B. 4.567 ; 2.137
C. 0.046 ; 0.214
D. 0.003 ; 0.058

16. Suppose x s a normally d str buted random var able w th μ = 58 and σ = 4 . F nd a value x 0 of the random var able x that sat sf es the follow ng equat ons or
statements.
a. 10% of the values of x are less than x 0 .
b. 80% of the values of x are less than x 0 .
c. 1% of the values of x are greater than x 0 .

a. x = (Round to two dec mal places as needed.)
0
b. x = (Round to two dec mal places as needed.)
0
c. x = (Round to two dec mal places as needed.)
0

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