Exam 13: Nominal Categorical Data and the Chi Square

Use the following: Hypothesis: Police citations for traffic violations are a function of the age of the driver. A random sample of 50 drivers was selected from the population of cited traffic violators during a one-month period. The drivers were categorized according to age, and the frequencies for each category were established. AGE OF DRIVER 18-27 28-37 38-47 48-57 58 and over fo 35 25 15 13 12 -Calculate the chi square.

On a 1 by k chi square with a sample size of 100, the degrees of freedom must always equal

On a 1 by k chi square, the tabled value needed for significance, at a given alpha level, cannot be found unless

The measurement scale employed in the study was

When a single group of subjects is allocated among any number of categories, the chance fe's for the chi square are

With chi square, the more categories there are

The McNemar test may only be used when the contingency table is

When the obtained value of chi square is equal to the critical, table value for a given number of degrees of freedom, then

Use the following: Hypothesis: Police citations for traffic violations are a function of the age of the driver. A random sample of 50 drivers was selected from the population of cited traffic violators during a one-month period. The drivers were categorized according to age, and the frequencies for each category were established. AGE OF DRIVER 18-27 28-37 38-47 48-57 58 and over fo 35 25 15 13 12 -Indicate the table value for chi square at the .01 level

When the chi square value is negative, it means

When the chi square fo's deviate significantly from the fe's, then

For any chi square, the degrees of freedom are equal to

When the fe's are determined, not on the basis of strict chance, but on the basis of some previous theory, then the tested hypothesis is

The chi square test may not be used when

With chi square, the larger the sample size

In order to use the McNemar test, the samples should be

Use the following: Hypothesis: Police citations for traffic violations are a function of the age of the driver. A random sample of 50 drivers was selected from the population of cited traffic violators during a one-month period. The drivers were categorized according to age, and the frequencies for each category were established. AGE OF DRIVER 18-27 28-37 38-47 48-57 58 and over fo 35 25 15 13 12 -Indicate the tabled value for chi square at the .05 level.

In order to calculate a chi square, it is assumed that

The null hypothesis for chi square states that the

In order to use chi square, the underlying distribution must be normal.