作者apei (請牢記最初的夢想)
看板FJU-ACC95b
標題[統計] 第一次小考解答
時間Wed Nov 7 20:37:08 2007
I. (1) Quantitative; Interval
(2) Qualitative; Nominal
(3) Quantitative; Ratio
(4) Qualitative; Nominal
(5) Qualitative; Ordinal
II. (1) All brands of minisystems manufactured.
(2) 10 elements.
(3) Quantitative: Price, CD capacity, Tape decks.
Qualitative: Sound quality, FM tuning.
(4) 70%
(5) 40%
III.(1) Stem-and-leaf display
0 8 9
1 0 2 2 2 3 4 4 4
1 5 5 6 6 6 6 7 7 8 8 8 8 9 9 9
2 0 1 2 2 2 3 4 4 4
2 5 6 8
3 0 1 3
(2) (3) (4)
Number Answered Correctly Frequency Relative Frequency Cumulative Frequency
-----------------------------------------------------------------------------
5 - 9 2 0.050 2
10 - 14 8 0.200 10
15 - 19 15 0.375 25
20 - 24 9 0.225 34
25 - 29 3 0.075 37
30 - 34 3 0.075 40
Totals 40 1.000
※註:(2)Histogram(略)※
IV. (1) Winter:variance:8.233, standard deviation:2.8694,
coefficient of variation:16.21%
Summer: 44.4889, 6.67, 26.05%
(2)盒型圖(略)
(3) More variability in the summer months.
V. (1) at least 75% of adults.
(2) The empirical rule is greater than Chebyshev’s theorem.
祝大家期中考順利!!
-----------------------------------
期中考試
時間:11/12(一)16:30~18:30
教室:LM203
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✽關於第二次作業✽
"限"課本93頁第19題(算標準差與變異數)
因為原先與甲班助教討論之作業評分原則~
但因甲班助教忘記了...所以導致評分標準與本班不同~
所以我決定要幫大家加分~
如果此題有被扣分的同學煩請期中考"當天"繳交給我!
逾期不收喔~~~~~~~~~!!
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