Question

a random number generator was used to resample the group. use the new table below to answer the questions.

	cholesterol in mg/dl
new treatment	225	248	221	242	235	246	250	224	241	242

what is the mean of the new control group? round to the nearest tenth.
a. 234.4
b. 237.4
c. 235.9
d. 242.5

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: Identify data and number of data - points

The new control group data is $220,245,247,230,243,218,245,240,224,232$. Here $n = 10$.

Step3: Calculate the sum of data

$\sum_{i=1}^{10}x_{i}=220 + 245+247+230+243+218+245+240+224+232$
$=2344$.

Step4: Calculate the mean

$\bar{x}=\frac{2344}{10}=234.4$.

Answer:

A. 234.4