The Average Two-Year-Old Has a Vocabulary of About How Many

question 102

Multiple Choice

The average two-year-old has a vocabulary of about how many words?

• A)175
• B)230
• C)320
• D)250

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Definitions:

Sample Mean

The average value obtained from a sample, calculated as the sum of all sampled observations divided by the number of observations.

Standard Deviation

A measure that quantifies the amount of variation or dispersion of a set of data values.

Null Hypothesis

In statistical hypothesis testing, the default assumption that there is no significant difference or effect.

Confidence Interval

A span of numerical values, obtained from sampled data, which is expected to encompass the value of a parameter yet to be known from a population.