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9966 [12]
3 years ago
6

Is a measure of dispersion that indicates how much scores in a sample vary around the mean of the sample?

Mathematics
2 answers:
Anika [276]3 years ago
5 0
<span>The measure of dispersion that indicates how much scores in a sample vary around the mean of the sample is the standard deviation.</span>
svetlana [45]3 years ago
5 0
The measure is called STANDARD DEVIATION.
Standard deviation is a mathematical measure that is used to evaluate the difference between the mean value of a set of number and each value in the group. It is calculated as the square root of variance by determining the variation between each data point relative to the mean.
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The time it takes Natalie to replace x cell phone screens is given by the equation t =
Alexxx [7]

Answer: 25 hours

Step-by-step explanation:

t=1+3x

8 screens

or

x = 8

Replace;

t=1+3(8)

t=1+24

t=25h

6 0
2 years ago
Today there are a total of six toll-free area codes: 800, 844, 855, 866, 877, and 888. Assume that all seven digits for the rest
Ludmilka [50]

Answer:

6 \times 10^{7}

Step-by-step explanation:

Total number of toll-free area codes = 6

A complete number will be of the form:

800-abc-defg

Where abcdefg can be any 7 numbers from 0 to 9. This holds true for all the 6 area codes.

Finding the possible toll free numbers for one area code and multiplying that by 6 will give use the total number of toll free numbers for all 6 area codes.

Considering: 800-abc-defg

The first number "a" can take any digit from 0 to 9. So there are 10 possibilities for this place. Similarly, the second number can take any digit from 0 to 9, so there are 10 possibilities for this place as well and same goes for all the 7 numbers.

Since, there are 10 possibilities for each of the 7 places, according to the fundamental principle of counting, the total possible toll free numbers for one area code would be:

Possible toll free numbers for 1 area code = 10 x 10 x 10 x 10 x 10 x 10 x 10 = 10^{7}

Since, there are 6 toll-free are codes in total, the total number of toll-free numbers for all 6 area codes = 6 \times 10^{7}

4 0
3 years ago
Determine if the expression - 4x²/2 is a polynomial or not. If it is a polynomial,
9966 [12]

Answer:

Step-by-step explanation:

Yes this is a  polynomial.

Type - monomial

Degree = 2              {Highest power of the variable is the degree}

8 0
3 years ago
Divide 72 in a ratio of 1:3:5
likoan [24]
<span>1+3+5 = 9

72/9 = 8

1 x 8 = 8
3 x 8 = 24
5 x 8 = 40

</span><span>72 in a ratio of 1:3:5 = 8:24:40</span>
6 0
3 years ago
If f(x)=5x-1, then f^-1(x)=
choli [55]

Answer:

F⁻¹(x) = \frac{1}{5} x +1

Step-by-step explanation:

Inverse of 5 would be 1/5, and

Inverse of -1 would be +1

Hope this helps!

7 0
3 years ago
Read 2 more answers
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