BROWSE MATHEMATICS ADVICE: |
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normal distribution |
| Question: | |
Hi mathematicians/statisticians
Being a student i need the answer of the following from examination point of view. plz be short and precise:
1)
Define statistics.
2) What is a normal probability distribution? what are the salient features of normal curve?
3) describe the importance of normal distribution in statistical theory.
4) what information is required to be known about a particular normal distribution before any probabilities can be calculated
5) Why it is always preferable to use standard normal distribution isolving real world problem?
thanx for reading and responsing.
(Rated by 3 Council Members)
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Kishore Kumar,
Council Member
Ammas.com
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1) Define statistics.
Numerical statements of facts in any department.
2) What is a normal probability distribution? what are the salient features of normal curve?
normal probability distribution
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(Rated by 3 Council Members)
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Anand V,
Council Member
Ammas.com
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Hi Ali,
These are basic questions and refer the bood - Statistics for Management - By Levin and Reuben - to find answers to these questions.
I guess you need to make an effort if you have intent
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(Rated by 3 Council Members)
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Bijo N,
Featured Member
Ammas.com
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hi Ali
I can give you the best site for mathematics, and you can find all kind of definitions in maths. so please check this site
http://mathworld.wolfram.com
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(Rated by 2 Council Members)
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| Subject: | |
math |
| Question: | |
in a sseries there are 4 terms . first 3 terms are in GP and last 3 terms are in AP with common difference 6 .find these numbers
(Rated by 4 Council Members)
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muhammad quresh,
Council Member
Ammas.com
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hi vikas!
here is the solution of ur question:
Let a be the first term of GP and r be the common ratio. then the first three terms are:
a,
ar, ar2
then the first term of AP must be ar, as t
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(Rated by 1 Council Members)
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| Subject: | |
mathematical query |
| Question: | |
1.The total expense of a boarding house are partly fixed and partly variable with the number of boarders. The charge is Rs.70 per head when there are 25 boarders and Rs.60 when there are 50 boarders. Find the charge per head when there are 100 boarders.
please help me in solving such type of problems.
2.A person had to multiply two numbers. Instead of multiplying by 35, he multiplied by 53and the product went up by 540. What was the raised product?
ans for Q2 is 1590. but i dont know how it was solved so please help me to get the reason.
(Rated by 4 Council Members)
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muhammad quresh,
Council Member
Ammas.com
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hi!
1. the first part of ur question seem to be incorrect, there need some additional information to solve the question.
2. the solution of second part is:
In the two numbers that a man had to
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(Rated by 1 Council Members)
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Afzal Mahmood,
Council Member
Ammas.com
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I will answer the 2nd one,
First of all in such typo Q'ns you must know the rule.
1. Whatever Done worng is to rectify first.
2. Than the rectified solution leads to real Answer.
Solution :
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(Rated by 2 Council Members)
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| Subject: | |
need d method for puzzle:: |
| Question: | |
A and B play a game of flipping coins. One loses Re 1 and wins Re1 for losing and winning respectively. At the end A has Rs 3 and B has won three games. How many games were played. [Ans.: 9]
(Rated by 2 Council Members)
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muhammad quresh,
Council Member
Ammas.com
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There may be many possible order of winning A or B according to the question. But we suppose that B win the first 3 games and the remaining by A.
Now as we suppose that the first 3 games won by B i
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(Rated by 3 Council Members)
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bujji phanikiran vanjarapu,
Council Member
Ammas.com
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The answer can be very easily obtained by the following method:
NOTHING IS MENTIONED ABOUT INITIAL AMOUNT AND WHO WILL GIVE THE AMOUNT TO THE WINNER!
Therefore we assume someone say C pays the win
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(Rated by 2 Council Members)
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praveen nair,
Registered Member
Ammas.com
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If B has won three games,that means A has lost three games and won three games,so totalnumber of games played were 3 + 3 = 6 but if A has win Rs 3 which means,total games played were 1+1+1+2+2+2 = 9
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(Rated by 3 Council Members)
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shivani ,
Registered Member
Ask Agent
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A has won 6 games and B has won 3 games. If B wins 3
games, A looses 1 Rs for each game.
A gain = 6 Rs.
A lost = 6 Rs.
A's net gain = 6-3 3 Rs.
B has won 3 games and his credit is -3 Rs.
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(Rated by 2 Council Members)
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Latha Jayaprakash,
Council Member
Ammas.com
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Dear Prem,
What is that you want now? You have given a sum and you have given the answer too. Do you want us to tell you how you got the answer or want us to solve the problem for you?
If A h
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(Rated by 2 Council Members)
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Bijo N,
Featured Member
Ammas.com
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hi prem!
Good maths.. but iam not sure about the answer 9. The answer will come 9 if its a 50 ps coin. In this case A wins 6 times to get 3 Rs. And the remaining 3 games won by B to complete the 9 ga
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(Rated by 2 Council Members)
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| Subject: | |
statistics (probability) |
| Question: | |
a man invites 5 friends. he was born in april as also all the invited friends. what is the probability that none of the friends was born oh the same day of the month
as the host?
(Rated by 2 Council Members)
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muhammad quresh,
Council Member
Ammas.com
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hi katy!
here is the solution of ur querry:
there are 6 persons (5 friends and 1host) and not two persons will have the same birth day.
now each person can have any one of the 30 days( days of th
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(Rated by 2 Council Members)
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Vani Balasubramanian,
Registered Member
Ammas.com
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Prob that none of the friends was born on the same day is (29/30)*(29/30)*(29/30)*(29/30)*(29/30)= 0.844
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(Rated by 2 Council Members)
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