Table A in your textbook has no negative z values, this means _________.
A) the table can only be used with positive z values
B) the table can be used with both positive and negative z values because it is symmetrical
C) the table can be used with both positive and negative z values because it is skewed
D) none of these

Question

Quizplus · Accepted Answer

Table A in the textbook is a standard normal distribution table, which means it has values for the standard normal distribution, with a mean of 0 and a standard deviation of 1. The standard normal distribution is symmetrical, which means that the values on the left-hand side of the mean are mirrored on the right-hand side, and vice versa. Therefore, the table can be used with positive and negative z values because the values are symmetrical and the same for positive and negative values of z.

Table a in Your Textbook Has No Negative Z Values