iq scores are collected from a sample of students at a large university. the scores are shown below. 99…

Explanation:

Step1: Recall mean formula

The mean $\bar{x}=\frac{\sum_{i = 1}^{n}x_{i}}{n}$, where $x_{i}$ are data - points and $n$ is the number of data - points.

Step2: Calculate the sum of data - points

$\sum_{i = 1}^{9}x_{i}=99 + 100+105+104+102+105+105+121+104$ $=945$

Step3: Determine the number of data - points

$n = 9$

Step4: Calculate the mean

$\bar{x}=\frac{945}{9}=105$

Answer:

105