I the Statistical Technique Used to Test the Equality of Three

question 22

Multiple Choice

i. The statistical technique used to test the equality of three or more population means is called analysis of variance (ANOVA)
ii. To employ ANOVA, the populations should have approximately equal standard deviations.
iii. To employ ANOVA, the populations being studied must be approximately normally distributed.

• A) (i), (ii) and (iii) are all correct statements
• B) (i) and (ii) are correct statements, but not (iii).
• C) (i) and (iii) are correct statements but not (ii).
• D) (ii) and (iii) are correct statements but not (i).
• E) All statements are false

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Definitions:

Sample

A subset of individuals or observations selected from a larger population for the purpose of statistical analysis.

Mean

The mean of a number set, found by dividing the total sum of the numbers by the quantity of numbers present in the set.

Confidence Interval

A selection of numerical values, from the analysis of sample stats, predicted to encapsulate the value of an unknown attribute of the population.

Mean

The arithmetic average of a set of numbers, calculated by adding all the numbers together and dividing by the count of those numbers.