Hiiiiiiii, okay here's the full- explanation for you, so here's the final answer. The explanation of how i got the answer is also below! Hope this helped you!!

Answer:

2.9

Step-by-step explanation:

First the mean or average = sum / data points (or N) = (2 + 4 + 7 + 8 + 9) / 5 = 6

Now we take each of the individual values subtract the mean, and then square them, and add it all up.

(2 - 6)^2 + (4 - 6)^2 + (7 - 6)^2 + (8 - 6)^2 + (9 - 6)^2 = 34

Then we divide this by degrees of freedom = N - 1 to find the sample standard deviation. Note that this is different from the population standard deviation, where we would just divide N, but we use this because our data set is small, like less than 30 points.

34 / (N - 1) -----> = 34 / (5 - 1) = 8.5

Now, this is the variance, so we take the square root of the variance to get the sample standard deviation:

√(8.5) = 2.9 (rounded to 1 decimal place)

Note that scientific calculators, even my $20 version can do these kind of statistics calculations. Just enter the data set as a table of values in statistics mode, and press a few buttons, you're done!

6 0

4 years ago

Graph the line with slope -3 passing through the point (5,0)

OleMash [197]

This shows (5,2) on a graph

8 0

3 years ago

Please answer this and show the work/explain for me<br> 2/7m - 1/7 = 3/14

IgorLugansk [536]

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5 0

3 years ago

Please help me! I need details please!

tankabanditka [31]

Plotting is the place the dots belong to?

If you want to do a positive of which is like (x,5) then you go to in between the right top and bottom or x axis where the positives are and count, if the (2,y) is positive you count and go up if y is a negative then you count down how many number there is.

Let’s use (1,-1) first you go into the x-axis, one is a positive so you go to one in there, and go down one or to -1 bc the -1 is a negative and the digit is 1. ( I hope it made sense, if u need more help u can tell me.)

7 0

3 years ago