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3 years ago

I think it’s 14? Is that right or no?

Mathematics

1 answer:

Rudiy273 years ago

6 0

Answer:

Im pretty sure its 11 because if you look at 145 mark its at between 10 and 12, Hopefully that helps!

Step-by-step explanation:

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

blsea [12.9K]

Answer:

The standard deviation of the age distribution is 6.2899 years.

Step-by-step explanation:

The formula to compute the standard deviation is:

$SD=\sqrt{\frac{1}{n}\sum\limits^{n}_{i=1}{(x_{i}-\bar x)^{2}}}$

The data provided is:

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

Compute the mean of the data as follows:

$\bar x=\frac{1}{n}\sum\limits^{n}_{i=1}{x_{i}}$

$=\frac{1}{11}\times [19+19+21+...+40]\\\\=\frac{299}{11}\\\\=27.182$

Compute the standard deviation as follows:

$SD=\sqrt{\frac{1}{n}\sum\limits^{n}_{i=1}{(x_{i}-\bar x)^{2}}}$

$=\sqrt{\frac{1}{11-1}\times [(19-27.182)^{2}+(19-27.182)^{2}+...+(40-27.182)^{2}]}}\\\\=\sqrt{\frac{395.6364}{10}}\\\\=6.28996\\\\\approx 6.2899$

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

7 0

3 years ago

For triangle Abc side a=18 angle C=90 and side b=24 find side c to the nearest whole number

ollegr [7]

...
Using the Pythagorean theorem, a² + b² = c², we can solve for 'c'.
We know the length of sides 'a' and 'b', and this is all we really need to know. The angle value of angle 'c' is irrelevant to finding the length of side 'c' (which I'm assuming is the hypotenuse).
18² + 24² = c².
324 + 576 = c².
900 = c². Now find the square root of 900 to get the value of 'c'.
30 = c. <= And there is your answer.

3 0

3 years ago

What 6 and 7 find Missing number 56 and

stiv31 [10]

6 x 7 = 42

And the missing number is 8, because 7 x 8 = 56.

3 0

3 years ago

Solve for x 3x + 10 - 4 = 21

Ivan

Answer:

X = 5

Step-by-step explanation:

6 0

4 years ago

Mrs. Reeds collects rocks. Each rock in her collection weighs about 4 ounces. Her collection weighs about 12 pounds in all. Abou

frozen [14]

Answer:

48 rocks

Step-by-step explanation:

there are 4 rocks in one pound since each rock weighs 4 ounces so 4 times 12 equals 48

7 0

3 years ago