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3 years ago

How do I find the indicated value?

Mathematics

1 answer:

spin [16.1K]3 years ago

5 0

Step-by-step explanation:

using this

t_n = a+ (n-1)d

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In the United States, the mean birth weight for boys is 3.41 kg with a standard deviation of 0.55 kg. Assume that the distributi

lyudmila [28]

Answer:

The proportion of baby boys in the United States that are born with low birth weight is 0.0495.

Step-by-step explanation:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

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

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

3.41 kg with a standard deviation of 0.55 kg.

This means that $\mu = 3.41, \sigma = 0.55$

What proportion of baby boys in the United States are born with low birth weight?

This is the pvalue of Z when X = 2.5. So

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

$Z = \frac{2.5 - 3.41}{0.55}$

$Z = -1.65$

$Z = -1.65$ has a pvalue of 0.0495

The proportion of baby boys in the United States that are born with low birth weight is 0.0495.

7 0

3 years ago

The equation of a circle is given below. (x − 5) 2 + ( y + 2 ) 2 = 81 4 (x−5) 2 +(y+2) 2 = 4/81 What is its center? Radius?

Dmitry_Shevchenko [17]

Answer:

The center is (5, -2) and the radius is 9/2

Step-by-step explanation:

The equation of a circle can be written in the form

(x-h) ^2 + (y-k)^2 = r^2

where (h,k) is the center and r is the radius

(x − 5)^2 + ( y + 2 )^2 = 81/4

(x − 5)^2 + ( y - -2 )^2 = (9/2)^2

The center is (5, -2) and the radius is 9/2

6 0

3 years ago

8a+6ab+5b,-6a-ab-8b and - 4a+2ab+3b<br><br>Pls answer this question

suter [353]

Answer:

4 a+8 ab+8b

Step-by-step explanation:

8 a-4 a+6ab+2ab+5 b+3 b

4 a+8 ab+8b

6 0

3 years ago

The dimensions of a rectangle porch are 16 feet long 12 feet wide. Use the scale of 1 inch=4 feet and a ruler to make a scale dr

Mnenie [13.5K]

Answer:

4 inch long and 3 inch wide

Step-by-step explanation:

so since the scale factor is 1 inch = 4 feet and the actual length is 16 feet by 12 feet all you got to do is divide both lengths by 4 and you get 4 and 3 and you convert the unit to inches so it would be 4 inches and 3 inches. now all you got to do is draw a 4 inch long by 3 inch wide rectangle and your good

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4 years ago

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Which single transformation is shown below ?

kipiarov [429]

Answer:

H. reflection

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3 years ago