Question

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question 13 0.66 pts
when finding the area of the distribution that is above or below a negative z - score, you:

• simply look up the absolute value of the z score and then determine if you need to use the tail or body column of the table
• need a different z table with negative values in it

Explanation:

For the first part, when the value is more than half of the distribution, the body column of the unit - normal table is used as it gives the area from the mean to a particular z - score for the larger part of the distribution. For the second part, the standard unit - normal table only has positive z - scores. Since the normal distribution is symmetric, for a negative z - score, we look up the absolute value of the z - score and then decide whether we need the tail or body area based on the problem requirements.

Answer:

1. body
2. simply look up the absolute value of the z score and then determine if you need to use the tail or body column of the table