A study conducted by the Toledo police at the main intersection of the city between 7 to 9 AM revealed the number of vehicles proceeded through the intersection after light changed. Here is the information of 8 days during the study period:

Number of vehicle: 6, 12, 7, 8, 4, 5, 12, 10.

Find the mean, median, mode and standard deviation for the SAMPLE.

Mean = 8

Mode = 12

Median = 7.5

Standard deviation = 3.07

Step-by-step explanation:

We are given the following sample in the question:

6, 12, 7, 8, 4, 5, 12, 10

Formula:

where are data points, is the mean and n is the number of observations.  

Sum of squares of differences = 66

Mode is the most frequent observation of data.

Mode = 12

Since it repeats two times.

Sorted data:  4, 5, 6, 7, 8, 10, 12, 12

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this