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saveliy_v [14]
2 years ago
12

Given m||n, find the value of x. + (7x-7)° m (6x+11)°

Mathematics
1 answer:
KengaRu [80]2 years ago
5 0

Answer:

x = 18

Step-by-step explanation:

(7x - 7) \degree = (6x + 11) \degree \\ (exterior \: alternate \:  \angle s) \\  \\ 7x - 7 = 6x + 11 \\  \\ 7x - 6x = 11 + 7 \\  \\ x = 18

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Calculate δe, if q= 0.769 kj and w= -860 j .
Andreyy89
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If sample data come from a population that is not normally distributed, which
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Answer:

For a data from population which is not normally distributed, the sample means would be approximately a normal distribution if the sample size (n) is greater than 30

Step-by-step explanation:

For a data from population which is not normally distributed, the sample means would be approximately a normal distribution if the sample size (n) is greater than 30 i.e n ≥ 30 this is because the shape of a sample distribution depends on the sample size. But for  normal distribution population, the sample means would be approximately a normal distribution even if the sample size is less than 30;

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3 years ago
Which option correctly represents the graph of f(x) = 1/3x^2+2 and describes
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How can percents describe a change in area?
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7 0
3 years ago
Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 7.5 parts
DochEvi [55]

Answer:

We accept  H₀   with the information we have, we can say level of ozone is under the major limit

Step-by-step explanation:

Normal Distribution

population mean  =   μ₀   =  7.5   ppm

Sample size     n   =  16      df  =  n  -  1  df  =  15

Sample mean      =    μ   =  7.8  ppm

Sample standard deviation   =  s  =  0.8

We want to find out if ozono level, is above normal level that is bigger than 7.5

1.- Hypothesis Test

null hypothesis                          H₀         μ₀   =  7.5

alternative hypothesis             Hₐ          μ₀  >  7.5  

2.-Significance level    α  =  0.01   we will develop one tail-test (right)

then   for   df  =  15    and    α =  0,01   from t -student table we get

t(c)  = 2.624

3.-Compute  t(s)

t(s)  =  (  μ -  μ₀ ) / s /√n            ⇒   t(s)  = ( 7.8  -  7.5 )*4/0.8

t(s)  = 0.3*4/0.8

t(s)  = 1.5

4.-Compare   t(s)   and  t(c)

t(s)  <  t(c)       1.5  <  2.64

Then  t(s) is inside the acceptance region. We accept  H₀

7 0
2 years ago
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