When hypothesis testing involves more than two means, we use the ANOVA rather than the t-test. ANOVA stands for:
a. variation between the levels.
b. analysis of variances.
c. the estimation of the ratio of two population variances.
d. an optional variance analysis.
Q. 2A table, formula, or graph that shows all possible values x a random variable can assume, together with their associated probabilities P(x) is called:
a. a discrete probability distribution
b. a continuous probability distribution
c. a bivariate probability distribution
d. a law of total probability
e. all of these
Q. 3The measure of a specific level of a factor being tested in an ANOVA is the variance of the factor level.
Indicate whether the statement is true or false
Q. 4Which of following statements is true regarding the probability distribution for a discrete random variable X?
a. The probabilities must be nonnegative.
b. The probabilities must sum to 1.
c. The random variable must take on positive values between 0 and 1.
d. Both the probabilities must be nonnegative and the probabilities must sum to 1.
e. Both the probabilities must be nonnegative and the random variable must take on positive values between 0 and 1.
Q. 5In single-factor ANOVA, the degrees of freedom for the factor are equal to the number of factor levels tested less one.
Indicate whether the statement is true or false
Q. 6The weight of a box of candy bars is an example of a discrete random variable since there are only a specific number of bars in the box.
Indicate whether the statement is true or false
Q. 7In single-factor ANOVA, a sum of squares is actually a measure of variance.
Indicate whether the statement is true or false
Q. 8The graph of a discrete random variable looks like a histogram where the probability of each possible outcome is represented by a bar.
Indicate whether the statement is true or false
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