A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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Concept explainers

2-Proportion Test
In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.
Topic Video
Question
own tap shoes 3) Given the two-way frequency table below, and one student is chosen, find the probabilities described below. The students at Bertramville High School were surveyed about whether they wanted pizza or burgers at their end-of-year picnic. The data is displayed in the table to the right. PIzza burger しら|フフ Total PRshra a) P(pizza and Sophomore): 189 Total 443 777 b) P(pizza or Sophomore) = c) P(pizza | Sophomore) = d) P(Freshman U burgers) = %3D e) P(Freshman | pizza) = %3D f) P(pizza n burgers) =
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Transcribed Image Text:own tap shoes 3) Given the two-way frequency table below, and one student is chosen, find the probabilities described below. The students at Bertramville High School were surveyed about whether they wanted pizza or burgers at their end-of-year picnic. The data is displayed in the table to the right. PIzza burger しら|フフ Total PRshra a) P(pizza and Sophomore): 189 Total 443 777 b) P(pizza or Sophomore) = c) P(pizza | Sophomore) = d) P(Freshman U burgers) = %3D e) P(Freshman | pizza) = %3D f) P(pizza n burgers) =
Expert Solution
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Step 1

(a)

The data of the survey is given in the problem.

The probability of pizza is,

Ppizza=Total number of pizzanT

Substitute the values in the above equation.

Ppizza=334777=0.43

The probability of Sophomore is,

Psophomore=Total number of sophomorenT

Substitute the values in the above equation.

Psophomore=400777=0.515

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