The sat scores for a group of 10 students are shown. what is the mean absolute deviation of the group?
a. 45
b. 88
c. 880
d. 1532

B. 88

Step-by-step explanation:

First find the mean:

Add up the values to find the mean of the data set:

1520 + 1630 + 1480 + 1580 + 1400 + 1300 + 1700 + 1610 + 1580 + 1520 = 15320

Divide 15320 by 10 because there are 10 numbers in the data set:

Subtract the numbers of the data set by the mean:

1520 - 1532 = -12

1630 - 1532 = 98

1480 - 1532 = -52

1580 - 1532 = 48

1400 - 1532 = -132

1300 - 1532 = -232

1700 - 1532 = 168

1610 - 1532 = 78

1580 - 1532 = 48

1520 - 1532 = -12

The mean deviation is always positive so change the negatives to positives.  After that, add them up:

12 + 98 + 52 + 48 + 132 + 232 + 168 + 78 + 48 + 12 = 880

Divide 880 by 10 because there are 10 numbers in the data set:

The mean absolute deviation is 88

300pi

step-by-step explanation:

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5