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Mathematic S paper 2 (950/2)
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发表于 2-12-2009 10:41 PM
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发表于 2-12-2009 10:45 PM
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发表于 2-12-2009 10:46 PM
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发表于 2-12-2009 10:49 PM
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对咯,希望我们都对吧。。我的数学只能靠这张了。。。哈哈。。你有答案对照吗? |
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发表于 2-12-2009 10:56 PM
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回复 24# piggy_lover 的帖子
一起检查吧。。任何错误告诉我
2. (b) 0.264
3. (a) 4.78%
(b) 0.00043
4. (b) travelling time and distance
5. (a) 1/2 (b) both oso not
6. (a) i) 176.19 (b) (i) 236.57
7. (a) m=0.65, n=0.26 (b) Var(X)=0.4156 (c) =0.33
8. (a) PCC = 0.968 (b) y = 13.141 + 0.779x
9. (b) (ii) ABCHIJ (iii) 33 months
10. (a) p=0.6, s=0.03464
(b) (0.532,0.668)
(c) size increases.
11. (c) Q 1:-2.825 2:0.850 3:-4.725 4:6.700
(d) 26 cars
12. (d) i) 21.5, 25.5 ii) maximum profit = RM29000 (Based on my graph) |
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发表于 2-12-2009 11:03 PM
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回复 25# walrein_lim88 的帖子
不一样的是(我不会做的):
2,11
谢谢你的答案
[ 本帖最后由 piggy_lover 于 2-12-2009 11:06 PM 编辑 ] |
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楼主 |
发表于 2-12-2009 11:09 PM
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楼主 |
发表于 2-12-2009 11:10 PM
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楼主 |
发表于 2-12-2009 11:12 PM
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发表于 3-12-2009 01:04 PM
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回复 26# piggy_lover 的帖子
2. On the average, a button making machine is known to produce 6% defective buttons. A random sample of 100 buttons is inspected and if 8 or more buttons are found to be defective, the operation of the machine will be stopped.
(a) State the sampling distribution for the sample proportion of defective buttons. [1]
2 method
i) Using proportion
mean of proportion = 6%/0.06
variance of proportion = (pq)/n
= (0.06 x 0.94) / 100
= 0.000564
p ~ N (0.06 , 0.000564)
ii) Using binomial distribution
mean = np Variance = npq
= 100(0.06) =100(0.06)(0.94)
= 6 = 5.64
as n is sufficiently large and >30 as n = 100
let X = number of buttons
X~B(100,0,06)
X~app N(60, 5.64)
b) Find the probability that the operation of the machine will be stopped. [3]
P(machine will be stopped) = P (X >/=8)
if method (i)
P(X>/=8) = P(X > 7.5) (continuity correction)
= P(p > 7.5/100)
= P(p >0.075)
= P(Z >(0.075 - 0.06)/sq root*0.000564)
= P(Z>0.63161)
=0.264
if method (ii)
P(X>/=8)=P(X>7.5) continuity correction
=P(z>(7.5-6)/sq root*5.64)
=P(z>0.63161)
= 0.264
对不起,必须用英文来做 |
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楼主 |
发表于 3-12-2009 01:09 PM
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回复 30# walrein_lim88 的帖子
这题我好像没有对 |
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发表于 3-12-2009 01:11 PM
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楼主 |
发表于 3-12-2009 01:24 PM
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楼主 |
发表于 3-12-2009 01:27 PM
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发表于 3-12-2009 01:28 PM
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楼主 |
发表于 3-12-2009 01:55 PM
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回复 35# walrein_lim88 的帖子
你是说在word打数学符号的? |
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发表于 3-12-2009 01:56 PM
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发表于 3-12-2009 01:58 PM
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不是。。是在CARI这里。。怎样POST WORKING?? |
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楼主 |
发表于 3-12-2009 02:01 PM
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楼主 |
发表于 3-12-2009 02:02 PM
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原帖由 walrein_lim88 于 3-12-2009 01:58 PM 发表
不是。。是在CARI这里。。怎样POST WORKING??
你把你做的放在photobucket或者是那个imageshare的
然后把那个coded的copy下来再放来这边 |
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