Use the following to answer questions :
A researcher wants to test if the elementary school children spend less than 30 minutes per day on homework.A random sample of 64 children from the school shows that they spend an average of 24.5 minutes per day on homework.Assume that 
15.3 minutes,and that the test is to be made at the 1% significance level.
-What is the critical value of z?
Definitions:
Newborn Infant
A very young baby, typically defined as being less than one month old.
Z-Score
A numerical indicator that represents how a specific value compares to the average of a set of values, expressed through the number of standard deviations away from this average.
Standard Deviation
A measure of the amount of variation or dispersion of a set of values, indicating how much the values deviate from the mean of the set.
Free Throw Percentages
A statistical measure in basketball that represents the ratio of free throws made to the total number of free throw attempts.
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