Bottles filled by a certain machine are supposed to contain 12 oz of liquid. In fact the fill volume is random with mean 12.01 oz and standard deviation 0.35 oz.a) What is the probability that the mean volume of a random sample of 144 bottles is less than 12 oz?b) If the population mean fill volume is increased to 12.03 oz, what is the probability that the mean volume of a sample of size 144 will be less than 12 oz?

Answers

Answer 1

Answer:

a

 [tex]P(X < 12) = 0.3660[/tex]

b

  [tex]P(X < 12) = 0.1521[/tex]

Step-by-step explanation:

Considering question a

From the question we are told that

   The mean is  [tex]\mu = 12.01 \ oz[/tex]

    The standard deviation is  [tex]\sigma = 0.35 \ oz[/tex]

 The standard error of mean is mathematically represented as

      [tex]\sigma_{x} = \frac{\sigma}{\sqrt{n} }[/tex]

=>   [tex]\sigma_{x} = \frac{0.35}{\sqrt{144} }[/tex]              

=>   [tex]\sigma_{x} = 0.02917[/tex]

Generally the  probability that the mean volume of a random sample of 144 bottles is less than 12 oz is mathematically represented as

           [tex]P(X < 12) = P(\frac{X - \mu }{\sigma_{x}} < \frac{12 - 12.01 }{0.02917 } )[/tex]

[tex]\frac{X -\mu}{\sigma_{x} }  =  Z (The  \ standardized \  value\  of  \ X )[/tex]

      [tex]P(X < 12) = P(Z < -0.3425 )[/tex]

From the z table  the area under the normal curve to the left corresponding to   -0.3425  is

      [tex]P(X < 12) = P(Z < -0.3425 ) = 0.3660[/tex]

=>  [tex]P(X < 12) = 0.3660[/tex]

Considering question a

From the question we are told that

   The mean is  [tex]\mu = 12.03 \ oz[/tex]

Generally the  probability that the mean volume of a random sample of 144 bottles is less than 12 oz is mathematically represented as

           [tex]P(X < 12) = P(\frac{X - \mu }{\sigma_{x}} < \frac{12 - 12.03 }{0.02917 } )[/tex]

          [tex]P(X < 12) = P(Z < -1.0274 )[/tex]

From the z table  the area under the normal curve to the left corresponding to   -1.0274   is

      [tex]P(X < 12) = P(Z < -1.0274 ) =0.1521[/tex]

=>   [tex]P(X < 12) = 0.1521[/tex]


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Step-by-step explanation:

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This is a topic on coordinate geometry. If you would like to find out more you can give my Instagram page a follow as I'll be updating on this topic soon. In addition, I will be posting other useful materials created by myself at the same platform too!

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Answers

Answer:

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Answers

Answer:

The cost of grapefruits per box is $3, The cost of strawberries per box is $2.5

The cost of avocados per box is $6

Step-by-step explanation:

Let us represent the price of Grapefruits per box = g

Strawberries per box = s

Avocados per box = a

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2s + 3a = 23 ....... Equation 1

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London buys three boxes of grapefruit and four boxes of strawberries in Spain $19

3g + 4s = 19 ....... Equation 2

Tina buys seven boxes of grapefruit and five boxes of avocados in Spencer $51

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3g + 4s = 19 ....... Equation 2

7g + 5a = 51..... Equation 3

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The cost of grapefruits per box is $3.

The cost of strawberries per box is $2.5 and

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Answers

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Step-by-step explanation:

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