Exhibit 3-4
The following is the frequency distribution for the speeds of a sample of automobiles traveling on an interstate highway.
-Refer to Exhibit 3-4. The mean is
A)35
B)670
C)10
D)67

Question

Exhibit 3-4
The following is the frequency distribution for the speeds of a sample of automobiles traveling on an interstate highway. 
-Refer to Exhibit 3-4. The mean is
A)35 
B)670 
C)10 
D)67

Quizplus · Accepted Answer

The mean can be calculated by summing up all the values and dividing by the total number of values. Using the frequency distribution, we can calculate the sum of all values by multiplying each speed by its frequency and adding them up. This gives us: (40*2) + (50*3) + (60*4) + (70*7) + (80*2) + (90*1) = 560 + 150 + 240 + 490 + 160 + 90 = 1690. Dividing this by the total number of values (19), we get a mean of approximately 67. Therefore, the answer is D.

Exhibit 3-4 the Following Is the Frequency Distribution for the Speeds of Speeds