Test About The Difference Between two Population proportions.

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4 years ago
In community: We are Bangladeshi(1bc0) 
Exercise -1

300 people from distract and 200 from district of sample voters are casting 56% and 48%. votes to a candidate. using 0.05 significance level test that he is preferable to both district. Distract a prefers more ( a=0.05)

Exercise -2

from 900 adult people of Dhaka city. it is found that 50 are smokers and from Others city among 600 people 450 are Smokers. Can it be said from the required information that there is a significant difference between two city is smokers using 5% significance level.

Exercise -3

A company is considering two different television advertisement for promotion of a new product. Management believes that advertisement A is more effective than advertisement B. two test market areas with virtually identical consume characteristics are selected: advertisement A is used in one area and advertisement B in the other are. in a random sample of 60 customers who saw advertisement A, 18 tried the product. in a random sample of 100 customers who saw advertisement B, 22 tried the product. Does this indicate that advertisement A is more effective than advertisement B, if a 5% level of significance is used?

Exercise - 4

Random samples of 100 bolts manufactured by machine 'A' and 50 bolts from machine 'B' Showed 10 and 6 defective bolts respectively. Is there significant difference in the performance of the two Machines?

Exercise - 5

A Machine puts out 20 imperfect articles in a sample of 1000. after the machine is overhauled, it puts out 5 imperfect articles in a sample of 300. Has the machine improved?

Exercise -6

in Dhaka out a random sample of 500 households, 25% declared that they were regular readers of ' Jugantor ' in ctg. the proportion in sample of 600 was 30%. is there a significant difference in the two proportions?

Exercise -7

in a random sample of 500 persons from town A, 200 are found to be consumers of wheat. in a sample of 400 from town B, 220 are found to be consumers of wheat. Do these date reveal a significant difference between town A and B so far as the proportion of wheat consumers is concerned?

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Avatar for Foysol_Ahmod6678
Written by
4 years ago
In community: We are Bangladeshi(1bc0)

Comments

Nice to read your article. Thanks for posting something like this.

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User's avatar Sajeeb_alex
4 years ago

Thanks bro amazing written is verry hard work.. Carry on brother

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User's avatar Anowar90
4 years ago

Pollution problem have because very random. I agree with you. Your article are very important for us. Information is very helpful in our life

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User's avatar Habiba22
4 years ago

Your information is very helpful in our life

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User's avatar masud120
4 years ago

Comparing two proportions, like comparing two means, is common. If two estimated proportions are different, it may be due to a difference in the populations or it may be due to chance. A hypothesis test can help determine if a difference in the estimated proportions reflects a difference in the population proportions.

The difference of two proportions follows an approximate normal distribution. Generally, the null hypothesis states that the two proportions are the same. That is, H0: pA = pB. To conduct the test, we use a pooled proportion, pc.

The pooled proportion is calculated as follows:

c

x A + x + B n A + n B The distribution for the differences is: P ′ A − P ′ B

N [ 0 , √ p c ( 1 − p c ) ( 1 n A + 1 n B ) ] The test stati

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User's avatar Sonik63
4 years ago

This post is effective

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User's avatar Fariza123
4 years ago

I agree with you..population problem have beacome very random.For these reason no body can handling anything but can't do nothing.

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User's avatar DeepKnowledge
4 years ago

Thank you for amazing article.. About two Population proportions. nice post man.

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User's avatar rabiul25447
4 years ago

Good subject. Nice writing.

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User's avatar Mobarok0210
4 years ago

Thank you for amazing article.. About two Population proportions.

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User's avatar Afrin11
4 years ago
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