Help me please I know it’s not C please help me out !!!!!

Mathematics

1 answer:

solmaris [256]3 years ago

3 0

Answer:

Step-by-step explanation:

The following radical phrase should be non-negative.

x - 3 ≥ 0

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Fittoniya [83]

$\qquad\qquad\huge\underline{{\sf Answer}}♨$

Here we go ~

According to given figure,

$\qquad \sf \dashrightarrow \:x + 68 = 174$

$\qquad \sf \dashrightarrow \:x = 174 - 68$

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2 years ago

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4 years ago

If IQ scores are normally distributed with a mean of 100 and a standard deviation of 15, what is the mean IQ score after the sco

lianna [129]

Answer:

$\mu = 0 , \sigma=1$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the IQ scores of a population, and for this case we know the distribution for X is given by:

$X \sim N(100,15)$