Why is “n-1” used when calculating the sample variance?

What will be an ideal response?


Ans: Because there is more variability in a population than in a sample, when working with sample data, we need to obtain an unbiased estimate of the population variance in the sample data.

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Young children have difficulty understanding the implications of a disaster due to their ____________________ thinking. 

Fill in the blank(s) with the appropriate word(s).

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(p. 161) According to Lev Vygotsky, social interaction is a prerequisite for children to develop problem-solving skills.

Answer the following statement true (T) or false (F)

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Digital literacy can facilitate the career exploration process by helping you to evaluate online information

Indicate whether the statement is true or false

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Feedback from a peer group during middle childhood helps the child's development of:

A) Self regulation B) Conservation C) Work ethic D) Self-concept

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