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Unformatted text preview: Stats MA 243 Quiz 2 Ch 3. Spring 2013 f”) ‘
1. Match up {) Q Formula for standard deviation L Number in Population Q Sample Mean Q Formula for mean 1 Median a Number in sample tL Population Mean L M Formula for it of standard deviations from the mean & Standard deviation of population ’
5; Number of standard deviation from the mean __C_Standard deviation of sample 2. For the data 2 4 _7 810 11 12 14 14 14 find the a.mean ’5 /
L /
b. median 7 3 c. mode : mg mmg‘mr’ of my) TM @010 spreads Mm wmrm. 3. What does is the standard deviation 3 measure of wi d I)? ‘u., I “m;
x iiiiii}?
W" " it “h, p ‘ii‘x "jkﬂli
his,“ '\ , £ :11”
"‘4 m 71'
miﬂ My“ ,. 4. if the mean of a population is 30 and the standard deviation is '10, iim a. the 2 value for x=20. 0—30 = 40 =
2970’" 75 b. is 20 rare? 1/ No become 2 Falls torn/WW; (JUNO. ./ 5. Given tﬁ‘éllboxplot shown, 01 s: “0 OS; 70 Max:510 mm : l O l : 5
a.>lee the ﬁve number summary labeling what each represents. b. What%of the datal betweenS and 70? s. (f '
c Wh t' um? 7" fa ‘/
. 3 IS .
@3270 m 75/. 01° dam
d. ls lt a normal d'izjrlbution (symmetrlc bell)? Yes, no, or close.
0 e. What ls the range? 5/
90' I 2 (/
Boxplot of Column 1 w L______,_____L.__————————l
1 U 20 40 60 80
Sample Value ...
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 Spring '14
 AllaKucher
 Statistics

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