数学M/S Paper 2讨论专区

Euclidzz

1) Explain the least squares method to obtain equation of regression line, using diagram.

2) Explain what a least square regression line means.

3) Explain briefly why it is advisable to plot a scatter diagram before interpreting a Pearson correlation coefficient for a sample of bivariate distribution.

ching0615

想问谁有mathematics s 2002-2010 paper 1和paper 2 的答案？紧急！！！

英ying

回复 422# ching0615


   你找到答案了吗? 我需要Paper 2的

victor_chio1725

这里想问问，有谁的math S paper 2 课本想卖，或者是参考书。谢谢。

happy=]

a computer program has an error that causes the program not to function perfectly, n programmer are assigned seperately to detect the error. the probability that each programmer will detect the error is 0.875. determine the value of n if the probability that at least one programmer detects the error is 0.998

peaceboy

回复 426# happy=]


   P(x>= 1 ) = 0.998
1-P(x=0) = 0.998
P(x=0) = 0.002
(1-.0875)^n = 0.002
(0.125)^n = 0.002
n log 0.125 = log 0.002
n = log0.002 / log 0.125
   =3

happy=]

回复 427# peaceboy


   thanks for help...

happy=]

A married couple is taking driving tests. If the probability that either the husband or the wife passes the test each time is taken, is 0.8,
a) Find the probability that the husband or the wife passes the test after taking the test exactly two times,
b) Find the probability that both the husband and the wife pass the test after taking the test more than two times.
Ans: a) 0.294 b) 0.00107
i need working...

peaceboy

回复 429# happy=]


   题目完整了？

happy=]

回复 430# peaceboy
ya... the question only like tat... i type whole question d...

Allmaths

回复  peaceboy
ya... the question only like tat... i type whole question d...
happy=] 发表于 22-3-2012 09:18 PM

    哪一本书的题目？

happy=]

回复 432# Allmaths


   tuition gv de question... dunno from which book...

elainehappy

The cubic function is one of the most frequency occurring functions. It is interesting to investigate some properties of a cubic function.

1. Consider a cubic function f(x):ax^3+b , where a and b are real number and a not equal to 0. The shape of the graph of the cubic function depends on the value on the values of a and b.

   c) Investigate the points of intersection of the graphs of f and its tangents. What can u say abt the number of point of intersection.

这个问题有 1a, 1b, 1c.. 但是都是各各的，毫无联系。

我现在的问题是，我不会画tangents出来(in the graphs)..

这个是assignment 来的。lower form6 (2012)第一课, function.

拜托，帮帮我忙 >.<

CityCheah

求解

Allmaths

求解
CityCheah 发表于 30-6-2012 08:46 PM

    ∑[-1/(2r)+3/(r+1)-5/(2(r+2))]
=∑[-1/(2r)+1/(2(r+1))+5/(2(r+1))-5/(2(r+2))]
=∑[1/(2(r+1))-1/(2r)+5/(2(r+1))-5/(2(r+2))]


Let f(r)=1/[2(r+1)]


∑[1/(2(r+1))-1/(2r)+5/(2(r+1))-5/(2(r+2))]
=∑{f(r)-f(r-1)+5[f(r)-f(r+1)]}
=f(n)-f(0)+5[f(1)-f(n+1)]
=1/(2(n+1))-1/2+5[1/4-1/(2(n+2))]
=3/4+(1/2)[1/(n+1)-5/(n+2)]

CityCheah

谢谢你的回答
我有一些部分不是很明白，
3/(r+1)是怎么变成1/2(r+1)+5/2(r+1)的？
还有是f(0)不是应该变成1/0吗？为什么会变成1/2的？

Allmaths

谢谢你的回答
我有一些部分不是很明白，
3/(r+1)是怎么变成1/2(r+1)+5/2(r+1)的？
还有是f(0 ...
CityCheah 发表于 1-7-2012 11:22 AM

    Let a=1/(r+1),
1/(2(r+1))+5/(2(r+1))
=a/2+5a/2
=3a

这样应该明白吧？

注意我之前是Let f(r)=1/[2(r+1)] ，
所以 f(0)=1/[2(0+1)]=1/2

CityCheah

明白了，谢谢你

Olien

大家好！我有一些问题想问问大家的意见，希望大家能帮我解答。
在此先感谢大家！

我是STPM BAHARU 2012的考生，我学校提供的配套是：
Pengajian Am
MUET
Ekonomi
Perakuanan/ Sejarah
Pengajian Perniagaan/ Bahasa Melayu

学校没有教Math S的老师，可是我报考这个科目，
请问我的Kerja Kursus 可以拿给其他学校的老师批改或请教吗？
如果到了交Kerja Kursus的时间，我应该交给谁呢？

peaceboy

回复 439# Olien


    建议你问学校老师，如果学校老师不懂的话就打电话去mpm问