ANOVA Analysis

The ANOVA procedure is a statistical approach for determining whether or not

• The means of two or more samples are equal

• the means of more than two samples are equal

• the means of two or more populations are equal

• the means of two samples are equal

In a one-way ANOVA, which of the following statements is correct?

• There are multiple interactions

• An interaction is present

• An interaction can be tested

• There is no interaction

In the ANOVA, treatment refers to

• experimental units

• a factor

• applying a treatment/medicine

• different categorical levels

Which of the following statistical concepts is used to test differences in the means for more than two independent populations?

• Multiple t tests

• Analysis of variance

• Confidence Interval

• Regression Analysis

In a one-way ANOVA, if the computed F value exceeds the critical F value, what decision is made regarding the null hypothesis

• Reject H0 since there is evidence of a treatment effect.

• Do not reject H0 because a mistake has been made.

• Reject H0 since there is evidence that all means differ

• Do not reject H0 since there is no evidence of a difference

The number of times each experimental condition is observed in a factorial design is known as

• partition

• factor

• experimental condition

• replication

ANOVA tests use which of the following distributions?

• F

• t

• Z

• Chi-square

The one-way ANOVA is used to test statistical hypotheses concerning which of the following?

• Means

• Proportions

• Variances

• Standard deviations

In a one-way ANOVA, how many degrees of freedom exist for the F-test? (k represents the number of groups)

• (Nk-1) and (N-1)

• (k-1) and (N-k)

• (N-1) and (N-k)

• (k-N) and (N-k)

An ANOVA procedure is applied to data obtained from (k=5) samples with each containg (n=10) observations. The degrees of freedom for the critical value of F are

• 5 numerator and 45 denominator degrees of freedom

• 4 numerator and 45 denominator degrees of freedom

• 4 numerator and 5 denominator degrees of freedom

• 4 numerator and 9 denominator degrees of freedom