Statistics S1 Doubts

[B!(+)(+)dy $k(_)!!]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w11_qp_63.pdf
q3 all

It is binomial distribution...
So X is binomially distributed with n and p
So mean = np and variance = npq
Your job is to find n and p...
I gave you the hint..

 

[abdul moeed rana]

It is binomial distribution...
So X is binomially distributed with n and p
So mean = np and variance = npq
Your job is to find n and p...
I gave you the hint..

please splve this qs!!

 

[abdul moeed rana]

It is binomial distribution...
So X is binomially distributed with n and p
So mean = np and variance = npq
Your job is to find n and p...
I gave you the hint..

yehi to nae samajh a raha keh kia n loon or kia p???

 

[abdul moeed rana]

can someone tell me watd oes the phrase,"within 1 standard deviation of the mean"" means????

 

[abdul moeed rana]

It is binomial distribution...
So X is binomially distributed with n and p
So mean = np and variance = npq
Your job is to find n and p...
I gave you the hint..

within 1 standard deviation of the mean ka matlabb??

 

[B!(+)(+)dy $k(_)!!]

within 1 standard deviation of the mean ka matlabb??

Within 1 SD means the same as I explained b4...
It means P(mean-SD<X<mean+SD) ...
Got itttt..........?

 

[abdul moeed rana]

Within 1 SD means the same as I explained b4...
It means P(mean-SD<X<mean+SD) ...
Got itttt..........?

do mj 14 paper 61 then tell me
i hav tried ur method....
we do hav to divide by s.d
mean - sd,which s.d ,the one given i.e 1.345 or 1 sd??

 

[mak kings]

PLZZZ TELL (ii)b !!!

Nine cards are numbered 1, 2, 2, 3, 3, 4, 6, 6, 6.
(i) All nine cards are placed in a line, making a 9-digit number. Find how many different 9-digit
numbers can be made in this way
(a) if the even digits are all together, [4]
(b) if the first and last digits are both odd. [3]

(ii) Three of the nine cards are chosen and placed in a line, making a 3-digit number. Find how
many different numbers can be made in this way
(a) if there are no repeated digits, [2]
(b) if the number is between 200 and 300

 

[abdul moeed rana]

PLZZZ TELL (ii)b !!!

Nine cards are numbered 1, 2, 2, 3, 3, 4, 6, 6, 6.
(i) All nine cards are placed in a line, making a 9-digit number. Find how many different 9-digit
numbers can be made in this way
(a) if the even digits are all together, [4]
(b) if the first and last digits are both odd. [3]

(ii) Three of the nine cards are chosen and placed in a line, making a 3-digit number. Find how
many different numbers can be made in this way
(a) if there are no repeated digits, [2]
(b) if the number is between 200 and 300

i know how to do this.its easy

 

[B!(+)(+)dy $k(_)!!]

do mj 14 paper 61 then tell me
i hav tried ur method....
we do hav to divide by s.d
mean - sd,which s.d ,the one given i.e 1.345 or 1 sd??

The given 1...

 

[mnotanerd]

please help
(ii) Another set consists of 6 plastic mugs each of a different design and 3 china mugs each of a
different design. Find in how many ways these 9 mugs can be arranged in a row if the china
mugs are all separated from each other. [3]

 

[abdul moeed rana]

The given 1...

do we hav to divide it by sd too??

 

[abdul moeed rana]

The given 1...

u r sayin if mean is 23,then 23-1<X<23
+1.....???is this is wat u r sayin.?

 

[mnotanerd]

A box contains five balls numbered 1, 2, 3, 4, 5. Three balls are drawn randomly at the same time
from the box.
(i) By listing all possible outcomes (123, 124, etc.), find the probability that the sum of the three
numbers drawn is an odd number. [2]
The random variable L denotes the largest of the three numbers drawn.
(ii) Find the probability that L is 4. [1]
(iii) Draw up a table to show the probability distribution of L. [3]
(iv) Calculate the expectation and variance of L.

 

[mnotanerd]

Box A contains 5 red paper clips and 1 white paper clip. Box B contains 7 red paper clips and 2 white
paper clips. One paper clip is taken at random from box A and transferred to box B. One paper clip
is then taken at random from box B.
(i) Find the probability of taking both a white paper clip from box A and a red paper clip from box B.
[2]
(ii) Find the probability that the paper clip taken from box B is red. [2]
(iii) Find the probability that the paper clip taken from box A was red, given that the paper clip taken
from box B is red. [2]
(iv) The random variable X denotes the number of times that a red paper clip is taken. Draw up a
table to show the probability distribution of X. [4]

 

[abdul moeed rana]

A box contains five balls numbered 1, 2, 3, 4, 5. Three balls are drawn randomly at the same time
from the box.
(i) By listing all possible outcomes (123, 124, etc.), find the probability that the sum of the three
numbers drawn is an odd number. [2]
The random variable L denotes the largest of the three numbers drawn.
(ii) Find the probability that L is 4. [1]
(iii) Draw up a table to show the probability distribution of L. [3]
(iv) Calculate the expectation and variance of L.

no one will tell u,every 1 is doin their own work,so ...

 

[mnotanerd]

The times for a certain car journey have a normal distribution with mean 100 minutes and standard
deviation 7 minutes. Journey times are classified as follows:
‘short’ (the shortest 33% of times),
‘long’ (the longest 33% of times),
‘standard’ (the remaining 34% of times).
(i) Find the probability that a randomly chosen car journey takes between 85 and 100 minutes. [3]
(ii) Find the least and greatest times for ‘standard’ journeys.

 

[mnotanerd]

(a) Find how many numbers between 5000 and 6000 can be formed from the digits 1, 2, 3, 4, 5 and 6
(i) if no digits are repeated, [2]
(ii) if repeated digits are allowed.

 

[mnotanerd]

same problems here,dont know wat to do in these qs

i know the answers to the questions you posted..but isnce your not willing to help i will also not

 

[abdul moeed rana]

i know the answers to the questions you posted..but isnce your not willing to help i will also not

hahahaha,its okay