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3 years ago

Which expression is equivalent to -2 - 7 -2 - (-7) 2 - 7 -2 + (-7) 2+7

Mathematics

2 answers:

andrew11 [14]3 years ago

8 0

Answer:

-2+ (-7) = -2 - 7

Step-by-step explanation:

Lunna [17]3 years ago

7 0

Answer:

Step-by-step explanation:

-2+ (-7) = -2 - 7

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Step-by-step explanation:

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Step-by-step explanation:

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3 years ago

The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 3.0 (Think of these as

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Answer:

0.477 is the probability that the average score of the 36 golfers was between 70 and 71.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 70

Standard Deviation, σ = 3

Sample size, n = 36

Let the average score of all pro golfers follow a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(score of the 36 golfers was between 70 and 71)

$\text{Standard error of sampling} = \displaystyle\frac{\sigma}{\sqrt{n}} = \frac{3}{\sqrt{36}} = \frac{1}{2}$

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0.477 is the probability that the average score of the 36 golfers was between 70 and 71.

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