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28-12-2022
Mathematics

Answered

At Westville High School there are 315 seniors and 289 juniors. 65% of the seniors have parking

passes and 42% of the juniors have parking passes. The statistics teacher selects a SRS of 30

seniors and a separate SRS of 30 juniors. Let os - , be the difference in the sample proportions of

seniors and juniors that have parking passes.

d. What is the probability that the difference in sample proportions (senior - junior) of students

with parking passes is greater than 30%?

Answer :

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