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masha68 [24]
3 years ago
13

What number is one thousand more than 3,449?

Mathematics
1 answer:
yKpoI14uk [10]3 years ago
3 0

Answer:

4,449

Step-by-step explanation:

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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
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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
How do I found the surface area of a 3 by 3 by 3 square?????
Dahasolnce [82]
3*3*3=9 perhaps?? And then it would be in Surface Area??
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3 years ago
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How do I show work for this question?, A train travels at an average speed of 67.5 miles per hour. At this speed how far could t
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Answer: 219.375 miles

<u>Step-by-step explanation:</u>

d = r * t

   = 67.5 * 3.25

   = 219.375

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3 years ago
(PLEASE HELP)
stich3 [128]

Answer:

C

Step-by-step explanation:

Because you should be subtract each other by 20x to transfer from side to another side.

4 0
3 years ago
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There are 125 members in the school
Igoryamba

Answer:

125x + 5,000 > 25,000

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2 years ago
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