Exhibit 19-5
It Has Been Hypothesized That There Is No $\mu$

question 55

Multiple Choice

Exhibit 19-5
It has been hypothesized that there is no difference in the mathematical ability of men and women. To test this hypothesis, it was decided to use the Mann-Whitney-Wilcoxon test. A sample of men and women were given math tests. The scores on the tests are given below.
-Refer to Exhibit 19-5. The mean ( $\mu$ _T) is

• A)10
• B)110
• C)66
• D)55

---

Definitions:

X Chromosome

One of the two sex chromosomes, the X chromosome plays a crucial role in determining genetic traits and can be found in both males (XY) and females (XX).

Autosomal

Relating to any chromosome that is not a sex chromosome; autosomes are numbered from 1 to 22 in humans.

Dizygotic Twins

Also known as fraternal twins, are siblings born at the same time who have developed from two different eggs fertilized by two different sperm, sharing about 50% of their DNA.

Monozygotic Twins

Monozygotic twins are twins that originate from a single fertilized egg, thus sharing identical genetic material and typically having very similar appearances and physical traits.