Exam 14: Multiple Regression and Correlation Analysis

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. If the computed chi-square is 8.5, what is your decision at the 10% level of significance?

Which of the following are correct statements regarding the chi-square distribution?

A student asked a statistics professor if grades were marked "on the curve." The professor decided To give the student a project to determine if last year's statistics grades were normally distributed. The professor told the student that last year's mean mark was 70 with a standard deviation of 10 And to use the following results. What is your decision if α = 0.05?

Recently, students in a marketing research class were interested in the driving behaviour of Students. Specifically, the marketing students were interested if exceeding the speed limit was Related to gender. They collected the following responses from 100 randomly selected students: Based on the analysis, what can be concluded?

A student asked a statistics professor if grades were marked "on the curve." The professor decided To give the student a project to determine if last year's statistics grades were normally distributed. The professor told the student that last year's mean mark was 70 with a standard deviation of 10 And to use the following results. What is the calculated value of chi-square?

i. In the goodness-of-fit test, the chi-square distribution is used to determine how well an observed Set of observations "fits" an "expected" set of observations. ii. The sum of the expected frequencies and the sum of the observed frequencies must be equal. iii. If the computed value of chi-square is less than the critical value, reject the null hypothesis at a Predetermined level of significance.