Use z scores to compare the given values.

Based on sample data, newborn males have weights with a mean of 3292.4 g and a standard deviation of 697.5 g. Newborn females have weights with a mean of 3000.6 g and a standard deviation of 727.9 g. Who has the weight that is more extreme relative to the group from which they came: a male who weighs 1500 g or a female who weighs 1500 g?

Since the z score for the male is z

equals

=

and the z score for the female is z

equals

=

, the

female or male

has the weight that is more extreme.

Question

Mathematics

Boston Mathews

28 February, 17:47

Use z scores to compare the given values.

Based on sample data, newborn males have weights with a mean of 3292.4 g and a standard deviation of 697.5 g. Newborn females have weights with a mean of 3000.6 g and a standard deviation of 727.9 g. Who has the weight that is more extreme relative to the group from which they came: a male who weighs 1500 g or a female who weighs 1500 g?

Since the z score for the male is z

equals

=

and the z score for the female is z

equals

=

, the

female or male

has the weight that is more extreme.

+1

Answers (1)

Know the Answer?

Antony Finley · Answer 1

Z for males = 2.57

Z for females = 2.06

male value is more extreme

Step-by-step explanation:

Z score represents how many standard deviation you are from the mean.

The formula is:

Z = (Value - Mean) / (ST. DEV.)

For newborn males:

Z = (1500-3292.4) / 697.5 = 2.57

For newborn females:

Z = (1500-3000.6) / 727.9 = 2.06

Z score for newborn males is bigger, therefore 1500 is more extreme relative to the group