| Which statement is true? The variance is: | | A | a mean of squared deviations | | B | a mean of absolute deviations | | C | no mean at all | | D | a mean of positive and negative deviations | |
|
| If a store manager selected a sample of customers and computed the mean income for this sample, he has computed: | | A | a statistic | | B | a parameter | | C | a qualitative value | | D | none of the above | |
| Which statement is true? The variance is: | | A | a mean of squared deviations | | B | a mean of absolute deviations | | C | no mean at all | | D | a mean of positive and negative deviations | |
|
| If a store manager selected a sample of customers and computed the mean income for this sample, he has computed: | | A | a statistic | | B | a parameter | | C | a qualitative value | | D | none of the above | |
1.
The variance is
A. A mean of squared deviations [ANSWER]
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2.
OPTION A: A statistic.
It is because he got it from a SAMPLE. If he got it from a population, it would have been a parameter.
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