stat 1213 / Final / 1998 December 8 / page 2

PART II [25]
(A) 4  7 7 8 8 9 9 5  0 2 2 2 3 3 4 4 5 6 6 6 7 7 8 8 8 9 6  0 0 1 1 1 2 2 2 2 2 2 3 3 4 4 4 5 5 6 6 7 7 7 7 8 8 8 8 8 8 9 7  0 0 0 1 1 1 2 2 2 3 4 4 4 5 5 6 7 7 9 8  0 2 3 5 6The largest number of this stem & leaf diagram is 860 The standard deviation is nearest
(a) 1 (b) 2 (c) 10 (d) 30 (e) 100 (f) 300 (g) 1000


(C) The first quatrile of a normal distribution with zero mean and standard deviation one is nearest
(a) 1 (b) 0.7 (c) 0.25 (d) 0.68 (e) 1

(D) A survey is to be made to determine the amount of Z (pick your own product) used weekly by students of U.X.Y. A preliminary survey of Fifty (N=50) provides a confidence iterval of __________ 
