Over the past five years, a stock returned 6.2 percent, -10.4 percent, -2.2 percent, 16.9 percent, and 5.8 percent, respectively. what is the variance of these returns

83.51

Step-by-step explanation:

The formula for variance is

This means we subtract the mean of each value and square the result. Then take the SUM of each. Then divide by n, the number of numbers.

Let's find the mean (mu) first. Mean is the sum of all the numbers divided by the number of numbers.

Now we find the variance:

Variance =

The variance is 83.51

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4