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4vir4ik [10]
2 years ago
6

SOMEONE PLEASE PLEASE HELP ME ON THIS!!

Mathematics
2 answers:
erik [133]2 years ago
5 0

\frac{x}{20} =\frac{14}{8} \\x=\frac{14}{8}  \times 20=35Answer:

35

Step-by-step explanation:

MArishka [77]2 years ago
4 0

X=22

14 plus 8 gives you x

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A 95% confidence interval for a population mean is computed from a sample of size 400. Another 95% confidence interval will be c
Anna [14]

Answer:

The interval from the sample of size 400 will be approximately <u>One -half as wide</u> as the interval from the sample of size 100

Step-by-step explanation:

From the question we are told the confidence level is  95% , hence the level of significance is    

      \alpha = (100 - 95 ) \%

=>   \alpha = 0.05

Generally from the normal distribution table the critical value  of  \frac{\alpha }{2} is  

   Z_{\frac{\alpha }{2} } =  1.96

Generally the 95% confidence interval is dependent on the value of the margin of error at a constant sample mean or sample proportion

Generally the margin of error is mathematically represented as

      E = Z_{\frac{\alpha }{2} } * \frac{\sigma}{\sqrt{n} }    

Here assume that Z_{\frac{\alpha }{2} } \ and \  \sigma \ is constant so

     E =  \frac{k}{\sqrt{n} }

=>  E \sqrt{n} = K

=>   E_1 \sqrt{n}_1 =  E_2 \sqrt{n}_2

So  let  n_1 = 400 and n_2 =  100

=>   E_1 \sqrt{400} =  E_2 \sqrt{100}

=>  E_1 =  \frac{\sqrt{100} }{\sqrt{400} } E_2

=>  E_1 =  \frac{1}{2 } E_2

So From this we see that  the confidence interval for a sample size of 400 will be half that with a sample size of 100

   

     

   

7 0
2 years ago
Gcf of 27, 45 and 54
julia-pushkina [17]
The GCF is <span>1. hope that helps</span>
5 0
3 years ago
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A parabola is the set of all points that​...
Vlada [557]

Answer:

is equidistant from a focus point and a line

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3 years ago
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An expression is shown below (x^4/3)(x^2/3)
Nitella [24]
( x^\frac{4}{3}) (x^ \frac{2}{3})  = x^{ \frac{4}{3} + \frac{2}{3} }= x ^\frac{6}{3} = x^2


7 0
3 years ago
Read 2 more answers
what is the correct upper and lower control limits for 8.42 pounds and the accectable range for plus or minus .65 pounds
sweet [91]

Answer:

9.07 and 7.77 respectively.

Step-by-step explanation:

To determine the upper control limit, add 0.65 lb to 8.42 lb, obtaining 9.07 lb.

To determine the lower one, subtract 0.65 lb from 8.42 lb, obtaining 7.77 lb.

7 0
3 years ago
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