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.

answer: the two figures are congruent.

step-by-step explanation: they're congruent because figure efgh is reflected across the x and y axis but it was also rotated.

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if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads