Find the variance and standard deviation of the given set of data to the nearest tenth.{440, 130, 280, 500, 150, 640, 760}
A) variance = 222.7, standard deviation = 49,595.9
B) variance = 49,595.9, standard deviation = 24,798
C) variance = 49,595.9, standard deviation = 222.7
D) variance = 57,861.9, standard deviation = 240.5
Answers
Answer:
Part 1) variance = 49,595.9
Part 2) standard deviation = 222.7
Option C
Step-by-step explanation:
we have
set of data
step 1
Find the mean
Adds the values and divide by the number of values
In this problem the number of values is 7
step 2
for each number: subtract the Mean and square the result
step 3
work out the mean of those squared differences
----> this value is called the "Variance"
step 4
The standard deviation is the square root of the variance
so
The standard deviation is equal to
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6 and 1/4=6+1/4=24/4+1/4=25/4
x divided by y is teh same as x times 1/y
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Answer:
b
Step-by-step explanation:
because they are asking for twice the sum which equals 2 and then the unknown numbers are x
your answer would be x=2
Answers
The given expression are just three examples of the many possiblecombinations that can add up to 800.
To find three different ways in which two numbers can be added to equal 800, we can explore different combinations. Here are three examples:
1. Combination 1:
600 + 200 = 800
In this combination, the numbers 600 and 200 are added together to equal 800.
2. Combination 2:
400 + 400 = 800
In this combination, the numbers 400 and 400 are added together to equal 800.
3. Combination 3:
350 + 450 = 800
In this combination, the numbers 350 and 450 are added together to equal 800.
The key is to find two numbers whose sum equals 800. You can experiment with different pairs of numbers and add them together to find other valid combinations.
Learn more about Addition click;
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Here are some:
800 + 0 = 800
700 + 100 = 800
600 + 200 = 800
500 + 300 = 800
400 + 400 = 800
799 + 1 = 800
798 + 2 = 800
And so on.
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The cube root of 1,331 is 11 .
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B.
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C.
12x = 20
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x + 12 = 20
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