The survey results, showing the joint relative frequencies and marginal relative frequencies, are shown in the two-way table. What is the value of x?

tinfoQ 2021-09-18 Answered
A group of children and adults were polled about whether they watch a particular TV show. The survey results, showing the joint relative frequencies and marginal relative frequencies, are shown in the two-way table. What is the value of x? YesNoTotal Children0.30.40.7 Adults0.25x0.3 Total0.550.451

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Expert Answer

Caren
Answered 2021-09-19 Author has 15197 answers
Yes No Total We are given the two-way table:
Children 0.3 0.4 0.7
Adults 0.25 x 0.3
Total 0.55 0.45 1
0.25+x=0.3
We can determine x either on its column, or on its row: the last element in the column/row is the sum of the previous elements:
x=0.3-0.25
x=0.05 We determine x:
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