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3 years ago

I need help with these questions

Mathematics

1 answer:

Lelu [443]3 years ago

5 0

Percent 100
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part whole

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16% of 98 is 15.68 what is the solution

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Lol, bro, 15.68 is your solution

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3 years ago

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Answer: C

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Step-by-step explanation:

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Find the slope of the following graphs. A. 1 / 2 B. 2 C. -2 D. - 1 / 2

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Answer:

c, -2

Step-by-step explanation:

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What is the value of f(4), if f(x) = 2x - 16?

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A distribution of scores for a test of life stressors has a mean of µ = 125 and standard deviation of σ = 15. The researcher cal

laila [671]

Answer:

The mean and standard deviation for the z-scores in this distribution are 0 and 1 respectively.

Step-by-step explanation:

Let the random variable X follow a Normal distribution with mean μ and standard deviation σ.

The z-scores are standardized form of the raw scores X. It is computed by subtracting the mean (μ) from the raw score x and dividing the result by the standard deviation (σ).

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

These z-scores also follow a normal distribution.

The mean is:

$E(z)=E[\frac{x-\mu}{\sigma} ]=\frac{1}{\sigma}\times [E(x)-\mu] =\frac{1}{\sigma}\times [\mu-\mu]=0$

The standard deviation is:

$Var(z)=Var[\frac{x-\mu}{\sigma} ]=\frac{1}{\sigma^{2}}\times [Var(x)-Var(\mu)] =\frac{\sigma^{2}-0}{\sigma^{2}}=1\\SD(z)=\sqrt{Var(z)}=1$

Thus, the mean and standard deviation for the z-scores in this distribution are 0 and 1 respectively.

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3 years ago