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Kay [80]
3 years ago
10

I need help with answers 5-11

Mathematics
1 answer:
Shtirlitz [24]3 years ago
6 0
-6 is the correct answer
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Consider a data set containing the following values: 70 65 71 78 89 68 50 75 The mean of the preceding values is 70.75. The devi
Leokris [45]

Answer:

If this is the sample data, the sample variance is 125.07 and the sample standard deviation is 11.18

If this is a population data, the population variance is 109.44 and the population standard deviation is 10.46

Step-by-step explanation:

We are given the following data-set:

70, 65, 71, 78, 89, 68, 50, 75

Deviations from the mean

–0.75, –5.75 , 0.25, 7.25, 18.25, –2.75, –20.75, 4.2

Sample size, n = 8

Sample:

\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}  

where x_i are data points, \bar{x} is the mean and n is the number of observations.

Sum of squares of differences =

0.5625 + 33.0625 + 0.0625 + 52.5625 + 333.0625 + 7.5625 + 430.5625 + 18.0625 = 875.5

s = \sqrt{\dfrac{875.5}{7}} = 11.18

\text{ Sample variance} = s^2 = 125.07

Population:

\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n}  

where x_i are data points, \bar{x} is the mean and n is the number of observations.

Sum of squares of differences =

0.5625 + 33.0625 + 0.0625 + 52.5625 + 333.0625 + 7.5625 + 430.5625 + 18.0625 = 875.5

\sigma = \sqrt{\dfrac{875.5}{8}} = 10.46

\text{ Population variance} = \sigma^2 = 109.44

7 0
3 years ago
U + -5/6 = -1/3 solve for u
Phoenix [80]

Move all terms not containing U to the right side of the equation.

Exact Form:

U = 1/2

Decimal Form:

U = 0.5

8 0
2 years ago
Read 2 more answers
Question 8 c
balandron [24]
22 total tokens

15/22 is the probability you won’t draw a red
7 0
2 years ago
Where do we see integers in the world today?
neonofarm [45]
We see integers on calculators, money, and on math problems :)
8 0
3 years ago
What are the following numbers from least to greatest 14/5, -2.46, -10/4, 2.5
Vera_Pavlovna [14]

Answer:

-2.46, -10/4, 14/5, 2.5.

Step-by-step explanation:


8 0
3 years ago
Read 2 more answers
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