Question

principal philip used a random sample of 20 student records to determine how far, in miles, students school. the results are shown below. 3, 4, 5, 3, 4, 5, 6, 5, 4, 3, 2, 3, 4, 5, 6, 4, 8, 4, 3, 2. what is the mean distance that his students live from the school, rounded to the nearest tenth? 4.1 miles 4.2 miles 8.0 miles 8.3 miles

Explanation:

Step1: Find sum of data

$3 + 4+5 + 3+4+5+6+5+4+3+2+3+4+5+6+4+8+4+3+2=84$

Step2: Calculate the mean

The mean $\bar{x}=\frac{\text{Sum of data}}{\text{Number of data points}}$. Here, number of data points $n = 20$. So $\bar{x}=\frac{84}{20}=4.2$

Answer:

B. 4.2 miles