2 years ago

Find the value of x

Mathematics

1 answer:

Taya2010 [7]2 years ago

5 0

So for this, we will be using proportions. In this case, our proportion will be $\frac{3}{6} =\frac{6}{x}$

Firstly, cross-multiply: 36 = 3x

Next, divide both sides by 3 and your answer will be: 12 = x

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According to the empirical (69-95-99.7) rule, if a random variable z has a standard normal distribution, then approximately 95%

Dmitry_Shevchenko [17]

Using z-scores, it is found that the value of z is z = 1.96.

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Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula, which for a measure X, in a distribution with mean $\mu$ and standard deviation $\sigma$ , is given by:

$Z = \frac{X - \mu}{\sigma}$

It measures how many standard deviations the measure is from the mean.
Each z-score has an associated p-value, which is the percentile.

The normal distribution is symmetric, which means that the middle 95% is between the 2.5th percentile and the 97.5th percentile.
The 2.5th percentile is Z with a p-value of 0.025, thus Z = -1.96.
The 97.5th percentile is Z with a p-value of 0.975, thus Z = 1.96.
Thus, the value of Z is 1.96.

A similar problem is given at brainly.com/question/16965597

7 0

1 year ago

!!PLEASE CLICK THE IMAGE TO ANSWER!!

ratelena [41]

Hi, what exactly is the question ?

3 0

2 years ago

Anelle subtracts –4 from a number. The result is 2. What is the number? –6 –2 2 6

Lynna [10]

Answer:

the answer is 2. so it is 2