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Question: A survey of the opinions of property owners about a street widening project was taken to determine whether the resulting opinion was related to the distance of front footage. A randomly selected sample of 100 property owners was contacted and the results are shown below.

                                                Opinion

Front-Footage          For      Undecided       Against
Under 45 feet           12             4                   4
45 -120 feet             35             5                  30
Over 120 feet            3              2                   5

Answer these questions.

What is the critical value at the 5% level of significance?

What is the expected frequency for people who are undecided about the project and have property front-footage between 45 and 120 feet?

What is the null hypothesis?

What is the computed value of chi-square?

If the computed chi-square is 8.5, what is your decision at the 5% level of significance?

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