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?