The degrees of freedom associated with a chi-square test of independence where data are summarized in a contingency table with r rows and c columns equal the number of rows times the number of columns in the table minus two; that is, rc -2.
Indicate whether the statement is true or false
Q. 2Which of the following statements is correct?
a. The experiment of tossing a single coin once contains 1 simple event.
b. The experiment of rolling a single die once contains 6 simple events.
c. The experiment of spinning the Monte Carlo roulette wheel once contains 27 simple events.
d. The experiment of drawing a single card once from a standard deck contains 4 events.
e. The experiment of tossing a coin twice contains 2 simple events.
Q. 3The sum of the observed frequencies in a chi-square test of independence need not equal the sum of the expected frequencies.
Indicate whether the statement is true or false
Q. 4Any subset of the sample space is called:
a. an event
b. an experiment
c. mutually exclusive events
d. independent events
e. None of these
Q. 5For a contingency table, the expected frequency for a cell is determined by dividing the column total by the grand total.
Indicate whether the statement is true or false
Q. 6The sample space for an experiment can be represented by:
a. a joint probability table
b. the additive rule of probability
c. the multiplicative rule of probability
d. a tree diagram
e. None of these
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