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3 years ago

Can someone help me get the correct answer

Mathematics

2 answers:

lions [1.4K]3 years ago

7 0

I think it's the answer C, because in the second and third pairs, the -2 are the same.

Vadim26 [7]3 years ago

4 0

A. Yes, because every x-value corresponds to exactly one y-value. always look at the x value (x,y) make sure its not repeated.

(-4,-1), (-3,-3), (-1,-5), (-4,-7) < this would not represent a function because there are 2 (-4) in the x value.

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3 years ago

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2 years ago

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3 years ago

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soldi70 [24.7K]

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2 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