7 K4 f8 C( N/ U 1.The median score for the class is: p% ?/ ?$ s" }& ?- c# C2 j+ I, m( E9 o
A.76
; ~; e, z; f9 b) V$ h. N3 F B.77# n. \# x+ }: z% w* ?9 Q7 `
C.78
+ E$ u# G$ r: ^5 I5 p D.79
) o; G- a) V9 J E.800 U9 y5 a3 i% ^1 n! R; w* T" z
答案：B
! J& h5 Z% ]6 S* K. x, O 2.If 5 points were added to each score, which of the following would not be affected?/ V; D t/ [0 y
A.The highest score
4 G" t, ~, H* F8 z B.The mean for all scores
& U N b* P: H! ?4 Y C.The median for the seniors'scores& S, h* d$ [6 [' m$ y: O+ ^
D.The mode for the juniors' scores
5 x: a* O; N' }7 Q, @ E.The standard deviation for all scores' L$ u( O7 y6 N. j0 ]4 n( U
答案：E: u; |1 r [3 i. O1 w( b* G; ]+ e* k
3.If the mean score for the juniors were known, which of the following could be calculated from the information given?
@/ n/ {( J% c+ ^& T0 P (1) The range of the scores for the seniors
3 F! }4 E' \& v4 ]/ M8 U (2) The median score for the juniors8 B8 i- ?7 K+ I3 \7 d+ @+ X
(3) The mean score for the seniors
. P% ` J9 I. P' d A.None' {' M' m s( G( Y9 o
B.(1) only: L6 C& r1 _" a% B/ I3 i& d2 Z
C.(3) only. W5 H- I. V5 n3 ]; ~$ X3 {4 I% B
D.(1) and (2)) x, D5 d6 `1 R2 |
E.(2) and (3)
- r) Y$ o2 C8 v. g0 U 答案：C |
发表于 2012-8-15 12:55:17
