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4 years ago

NEED HELP ASAP 10 POINT QUESTION

Mathematics

1 answer:

vivado [14]4 years ago

4 0

45.2 megabytes. When the download is 19.3% complete, have been downloaded 45.2 megabytes.

To solve this problem we have to use the rule of three.

234 megabytes ----------> 100%

x <---------- 19.3%

x = (234)(19.3)/100

x = 4516.2/100

x = 45.162

Round to the nearest tenth:

x = 45.2 megabytes

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3 years ago

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3 years ago

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3 years ago

In a recent year, grade 8 Washington State public school students taking a mathematics assessment test had a mean score of 281 w

sweet-ann [11.9K]

Answer:

The probability that the mean test score is greater than 290

P(X⁻ > 290 ) = 0.0217

Step-by-step explanation:

Step(i):-

Mean of the Population (μ) = 281

Standard deviation of the Population = 34.4

Let 'X' be a random variable in Normal distribution

Given X = 290

$Z = \frac{x -mean}{\frac{S.D}{\sqrt{n} } } = \frac{290-281}{4.44} = 2.027$

Step(ii):-

The probability that the mean test score is greater than 290

P(X⁻ > 290 ) = P( Z > 2.027)

= 0.5 - A ( 2.027)

= 0.5 - 0.4783

= 0.0217

The probability that the mean test score is greater than 290

P(X⁻ > 290 ) = 0.0217

6 0

3 years ago