The ages of 11 students enrolled in an on-line macroeconomics course are given in the following steam-and-leaf display:

Stem Leaf

1 9 9
2 1 5 5 8 9
3 0 1 2
4 0
Here 1|9 implies 19 years (i. e. the stem represents tens and leaf represents units).

The standard deviation of the age distribution is years. [Answer up to four digits after decimal]

Incorrect. Tries 2/3 Previous Trie

The standard deviation of the age distribution is 6.2899 years.

Step-by-step explanation:

The formula to compute the standard deviation is:

The data provided is:

X = {19, 19, 21, 25, 25, 28, 29, 30, 31, 32, 40}

Compute the mean of the data as follows:

Compute the standard deviation as follows:

Thus, the standard deviation of the age distribution is 6.2899 years.

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.  

perimeter = 10 +  √10  units

explanation:

first, we will need to get the length of each line using the distance formula which is as follows:

distance = 

1- length of ab:

ab =   = 5 units

2- length of ac

length of ac is the same as ab = 5 units

3- length of bc:

bc =   =  √10  units

now, we can get the perimeter by adding the side lengths as follows:

perimeter = 5 + 5 +  √10

perimeter = 10 +  √10  units

hope this : )

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