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insens350 [35]
3 years ago
8

Find f(-1) please help, not good at math.

Mathematics
1 answer:
bagirrra123 [75]3 years ago
7 0
This means that X in the equation equals -1
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3 years ago
For a normal distribution with μ=500 and σ=100, what is the minimum score necessary to be in the top 60% of the distribution?
STatiana [176]

Answer:

475.

Step-by-step explanation:

We have been given that for a normal distribution with μ=500 and σ=100. We are asked to find the minimum score that is necessary to be in the top 60% of the distribution.

We will use z-score formula and normal distribution table to solve our given problem.

z=\frac{x-\mu}{\sigma}

Top 60% means greater than 40%.

Let us find z-score corresponding to normal score to 40% or 0.40.

Using normal distribution table, we got a z-score of -0.25.

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Therefore, the minimum score necessary to be in the top 60% of the distribution is 475.

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