For the Scores in the Following Table,what Is the Value $$\begin{array} { c c } \ X & \mathrm { f } \\\hline 4 & 1 \\3 & 2 \\2 & 1 \\1 & 3\end{array}$$

question 22

Multiple Choice

For the scores in the following table,what is the value of ?X²? $$\begin{array} { c c } \ X & \mathrm { f } \\\hline 4 & 1 \\3 & 2 \\2 & 1 \\1 & 3\end{array}$$

• A)30
• B)41
• C)65
• D)225

---

Definitions:

Rhizobium

A genus of bacteria that forms symbiotic relationships with legumes, fixing nitrogen from the air into a form that plants can use for growth.

Nitrogen Fixation

The process by which certain bacteria convert atmospheric nitrogen into ammonia, making it available for plants and other organisms.

Earth's Tilt

The angle between Earth's rotational axis and its orbital axis, which significantly influences seasonal changes and climate.

Denitrification

A microbial process by which nitrogen in the soil is converted back into gaseous nitrogen, removing it from the ecosystem.