What is the variance of the data set? Round to the nearest
hundredths.
A store manager is looking at past jewelry sales to
determine what sizes of rings to keep in stock. The list
shows the ring sizes purchased by the last ten jewelry
customers.
9,7, 6.5, 7.5, 7, 8, 5, 6, 7.5, 8

answer:

7, and -7

Step-by-step explanation:

you find the mean, median, and mode, then you subtract 7 from the mean, and multiply it by 4

you get 7, then square root it and raise it to the power of 90000000, and you get 1.375*10^931 and you divide it by 349485859 to get 7, but you also need -7

c

step-by-step explanation:

c

see below

step-by-step explanation:

7.   there are 10 data points in the set.   the middle point is between 5 and 6.   the middle point in the top half is 8   and the middle point in the bottom half is 3. to find the iqr , take point 8 and subtract point 3

mid term   point 8 = 100   point 3 = 88

iqr = 100-88 = 12

final   point 8 = 93   point 3 = 78

iqr = 93 - 78 = 15

the final has the greatest iqr

6.   b - there is a high data value that causes the data set to be asymmetrical for the males: the data for males are high and asymmetrical .   there is an outlier for the males that skews the data

5.   the   iqr is a better measure of spread for the movies and basketball games.   since the basketball game has an outlier, we do not want to use standard deviation for measurement.  

3.   the exam median is much higher than the class median.   the median line is farther to the right on the exams

2.   there is no way to tell what the means are from the box and whisker plots.