Exam 14: Multiple Regression and Correlation Analysis

The personnel manager is concerned about absenteeism. She decides to sample the records to Determine if absenteeism is distributed evenly throughout the six-day workweek. The null Hypothesis to be tested is: Absenteeism is distributed evenly throughout the week. The 0.01 level is To be used. The sample results are: Using the Goodness of Fit Test above, what can you state about the observed absences?

i. The chi-square goodness-of-fit test can be applied if there are equal or unequal expected Frequencies. ii. For a goodness-of-fit test, the following are possible null and alternate hypotheses. Null: Sales are Uniformly distributed among the five locations. Alternate: Sales are not uniformly distributed among The five locations. iii. The number of degrees of freedom appropriate for the chi-square goodness-of-fit test is the Number of categories minus 1.

i. Nonparametric tests of hypotheses, which are also called distribution free tests, require the Population to be normally distributed. ii. The computed value of chi-square is always positive because the difference between the Observed frequencies and the expected frequencies are squared. iii. The shape of the chi-square distribution changes for each number of degrees of freedom.

i. Chi-square test statistic used in a goodness-of-fit test has k - 1 degrees of freedom. ii. The chi-square goodness-of-fit test can be applied if there are equal or unequal expected Frequencies. iii. For a goodness-of-fit test, the number of degrees of freedom is determined by k - 2, where k is The number of categories.

The personnel manager is concerned about absenteeism. She decides to sample the records to Determine if absenteeism is distributed evenly throughout the six-day workweek. The null Hypothesis to be tested is: Absenteeism is distributed evenly throughout the week. The 0.01 level is To be used. The sample results are: How many degrees of freedom are there?

In the chi-square test, the null hypothesis (no difference between sets of observed and expected Frequencies) is rejected when the:

When determining how well an observed set of frequencies fit an expected set of frequencies the Test is the:

To analyze data cross-classified in a contingency table, how are the degrees of freedom found?

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: The null hypothesis for the analysis is:

How many degrees of freedom do we use for the chi square goodness of fit test?

At a recent car show, a sample of 125 people produced the following results. Use the 0.05 Significance level to determine if there is a relationship between age and model preferred.

The following table classifies an individual in two ways-by gender and by educational choice. Using the data from this Megastat printout, you determine:

i. The claim that "male and female University of Toledo students prefer different parking lots on Campus" is an example of a chi-square null hypothesis. ii. For contingency table analysis using the chi-square test, multiplying the number of rows minus 1 By the number of columns minus 1 will give you the degrees of freedom. iii. For a contingency table, the expected frequency for a cell is found by dividing the row total by The grand total.

Six people have declared their intentions to run for a trustee seat in the next local election. A Political poll is conducted during the campaign among 1,020 voters to determine if there is any clear Preference among the voters. The responses are shown below. What is the expected frequency for each candidate?

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 5% level of significance? What is your Decision at the 1% level of significance?

Six people have declared their intentions to run for a trustee seat in the next local election. A Political poll is conducted during the campaign among 1,020 voters to determine if there is any clear Preference among the voters. The responses are shown below. How many degrees of freedom are there?

i. chi-square test statistic used in a goodness-of-fit test has k - 2 degrees of freedom. ii. A goodness-of-fit test is a nonparametric test involving a set of observed frequencies and a Corresponding set of expected frequencies. iii. For a goodness-of-fit test, the following are possible null and alternate hypotheses. Null: Sales are uniformly distributed among the five locations. Alternate: Sales are not uniformly distributed among the five locations.

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: Using 0.05 as the significance level, what is the critical value for the test statistic?

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?

Six people have declared their intentions to run for a trustee seat in the next local election. A Political poll is conducted during the campaign among 1,020 voters to determine if there is any clear Preference among the voters. The responses are shown below. If the computed chi-square is 30, what is your decision at the 1% level of significance? What is your Decision at the 5% level of significance?