Here are the prices for 8 different CD players.Find the standard deviation. $254 $323 $268 $446 $222 $313 $308 $144
A)$87.65
B)$648,660.50
C)$183.00
D)$702,438.00
E)$222

Question

Quizplus · Accepted Answer

The standard deviation is calculated by finding the square root of the variance. First, calculate the mean (average) of the prices: (254 + 323 + 268 + 446 + 222 + 313 + 308 + 144) / 8 = $247.375. Then, find the variance by calculating the average of the squared differences from the Mean: [(254-247.375)^2 + (323-247.375)^2 + (268-247.375)^2 + (446-247.375)^2 + (222-247.375)^2 + (313-247.375)^2 + (308-247.375)^2 + (144-247.375)^2] / 8 = 7672.984375. The standard deviation is the square root of the variance, which is approximately $87.65.

Here Are the Prices for 8 Different CD Players