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LuckyWell [14K]
3 years ago
8

4/18 is closest to: 1/2 or 1 whole

Mathematics
2 answers:
skelet666 [1.2K]3 years ago
7 0

Answer:0

Step-by-step explanation:

Anika [276]3 years ago
3 0

Answer:

1/2, since 1 whole is 18/18 and 1/2 is equal to 9/18

Step-by-step explanation:

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The calibration of a scale is to be checked by weighing a 13 kg test specimen 25 times. Suppose that the results of different we
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Solution :

a).

Given : Number of times, n = 25

            Sigma, σ = 0.200 kg

            Weight, μ = 13 kg

Therefore the hypothesis should be tested are :

$H_0 : \mu = 13 $

$H_a : \mu \neq 13$

b). When the value of $\overline x = 12.84$

 Test statics :

   $Z=\frac{(\overline x - \mu)}{\frac{\sigma}{\sqrt n}} $

  $Z=\frac{(14.82-13)}{\frac{0.2}{\sqrt {25}}} $

          $=\frac{1.82}{0.04}$

          = 45.5  

P-value = 2 x P(Z > 45.5)

            = 2 x 1 -P (Z < 45.5) = 0

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So reject the null hypothesis.

Therefore, we conclude that the true mean measured weight differs from 13 kg.

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