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anonymous
 one year ago
A sample of 168 individuals is selected, and the individuals are classified according to their smoking habits and the smoking habits of their parents. The results are given in the contigency table below.
What is the relative frequency of individuals in the sample who have two parents who do not smoke?
anonymous
 one year ago
A sample of 168 individuals is selected, and the individuals are classified according to their smoking habits and the smoking habits of their parents. The results are given in the contigency table below. What is the relative frequency of individuals in the sample who have two parents who do not smoke?

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kropot72
 one year ago
Best ResponseYou've already chosen the best response.0First you need to find the totals of the values in the 2 rows and the 3 columns of the contingency table. Then you divide the total number of individuals who have parents neither of which smoke by 168.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0well I did 168 divided by 18 and got 9.33333 because that is the only family who doesnt smoke

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I mean 47 my bad hold on

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok sratch that I got 2.5 because I added 47 and 23

kropot72
 one year ago
Best ResponseYou've already chosen the best response.0When I added the number of individuals who smoke, but have both parents nonsmokers (23 individuals) to the number of individuals who don't smoke and who have both parents nonsmokers (47 individuals) I get the following: 23 + 47 = 70 The relative frequency of individuals in the sample who have two parents who do not smoke is then given by: \[\large \frac{70}{168}= this\ fraction\ needs\ simplifying\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0wait! @kropot72 there is no option to simply, I need to round my answers to a decimal.

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0all you need to do is put 5/12 into a calculator, and it'll give you 5/12 in decimal form

kropot72
 one year ago
Best ResponseYou've already chosen the best response.0@atlantaslast How many decimal places are required in the answer?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0two decimals places.

kropot72
 one year ago
Best ResponseYou've already chosen the best response.0Then you will need to round up in this case.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0how would that be? I just guessed and put 4.1 because it said 0.4166666

kropot72
 one year ago
Best ResponseYou've already chosen the best response.0Not really. ).416666666 rounded to two decimal places is 0.42.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so the answer would be 0.42?
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