To make tests of hypotheses about more than two population means, we use the: t distribution normal distribution chi-squ

1. To make tests of hypotheses about more than two population means, we use the:

t distribution

normal distribution

chi-square distribution

analysis of variance distribution

2. You randomly select two households and observe whether or not they own a telephone answering machine. Which of the following is a simple event?

At most one of them owns a telephone answering machine.

At least one of them owns a telephone answering machine.

Neither of the two owns a telephone answering machine.

Exactly one of them owns a telephone answering machine.

3. In a one-way ANOVA, we analyze only one:

population

mean

variable

sample

4. The regression model y = A + Bx + e is:

an exact relationship

a probabilistic model

a nonlinear model

a deterministic model

5. For a goodness-of-fit test, the frequencies obtained from the performance of an experiment are the:

objective frequencies