Two students investigate whether people are more likely to be helpful in a busy street or...

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Two students investigate whether people are more likely to be helpful in a busy street or...

Two students investigate whether people are more likely to be helpful in a busy street or a quiet street. One of them drops a bag of apples at randomly selected times during the day and the other watches to see whether anyone helps by picking them up and returning them to their owner. The results are as follows.

	Busy	Quite
Helped	20	25
Not Helped	15	5

For Chi-Square test, write a table of expected values.

math Statistics-And-Probability

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Answer #1

Solution: we want to test hypothesis

Ho: People are more likely to be helpful in busy street is independent.

V/a

Ha: People are more likely to be helpful in busy street is dependent.

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