A sample of 300 is classified by whether they are planning on attending an upcom

Question

A sample of 300 is classified by whether they are planning on attending an upcoming school event (Yes, Maybe, No) and their year in school (Freshman, Sophomore, Junior, Senior). The sample consists of 120 freshman, 20 sophomores, 100 juniors, and 60 seniors. 30 of the 60 seniors plan to attend the event (said Yes). How many of the freshmen would you expect to also be attending the event if there's no relationship between year in school and participation? [Hint: Draw the matrix and fill in the known information. This should help you figure out the values in all the other spots in the matrix.]

Explanation / Answer

FOR THERE is no relationship between year in school and participation

participation ratio would be same for seniors and freshman

hence if x freshmen attend the event

x/120 =30/60

x=60 freshmen would attend

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