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mylen [45]
3 years ago
5

Suppose medical records indicate that the length of newborn babies(in inches) is normally distributed with a mean of 20 and a st

andard deviation of 2.6 find the probability that a given infant is between 14.8 and 25.2 inches long

Mathematics
2 answers:
inna [77]3 years ago
6 0

Answer: 95

Step-by-step explanation:

Hope this helps!

Nadusha1986 [10]3 years ago
4 0

Answer:

P=0.954 or 95.4%

Step-by-step explanation:

Using the formula for the standardized normal distribution to find Z:

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

Where μ is the mean (μ=20) and σ is the standard deviation (σ=2.6).  

Z_{1} =\frac{14.8-20}{2.6}=-2.0

Z_{1} =\frac{25.2-20}{2.6}=2.0

In the table of the normal distribution, we can look for positive values z, and these values are going to represent the area under the curve between z=0 and the values searched. the negatives values are found by symmetry (with the corresponding positive value but remember this area is under the left side of the curve).  To find a value in the table, find the units in the first column and the follow over the same row till you find the decimals required.

P_1=0.4772

P_2=0.4772

P_1 represents the probability of length being between 14.8 and 20 (the mean) and P_2 represents the probability of length being between 20 and 25.2, The requested probability is the sum of these two.

P=P_1+P_2=0.954

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I need help please and thank u,
Alchen [17]

The illegal values of b are when the denominator equals 0.

So, b^2-2b-8=0 gives you (b-4)(b+2)=0

Therefore, b=4 and b=-2, which is answer A.


8 0
3 years ago
Convert 15 m² to in². How many square inches are in 15 square meters?
Sati [7]

Answer:

23250

Step-by-step explanation:

23250 square inches are in 15 square meters.

3 0
3 years ago
Claudia was cooking breakfast for her entire family she may double the amount of chocolate chip pancakes as she did regular panc
maw [93]

Answer: she made 36 chocolate chip pancakes, 18 regular pancakes, 9 blueberry pancakes and 27 sausagesl

Step-by-step explanation:

Let w represent the number of chocolate chip pancakes that she made.

Let x represent the number of regular pancakes that she made.

Let y represent the number of blueberry pancakes that she made.

Let z represent the number of sausages that she made.

she made double the amount of chocolate chip pancakes as she did regular pancakes. This means that

w = 2x

x = w/2

she only made half as many blueberry pancakes and she did regular pancakes. This means that

y = x/2

y = w/4

she made triple the amount of sausage as blueberry pancakes. This means that

z = 3y

z = 3w/4

if she cooked 90 items total, it means that

w + x + y + z = 90 - - - - - - - - - -1

Substituting x = w/2, y = w/4 and z = 3w/4 into equation 1, it becomes

w + w/2 + w/4 + 3w/4 = 90

Multiplying through by 4, it becomes

4w + 2w + w + 3w = 360

10w = 360

w = 360/10

w = 36

x = w/2 = 36/2

x = 18

y = w/4 = 36/4

y = 9

z = 3y = 3 × 9

z = 27

6 0
3 years ago
Name
kozerog [31]

2, 8, 32, 128,

Multiply by 4 for each number

8/2= 4

32/8= 4

128/32= 4

128*4=512

512*4= 2,048

Answer: D 512, 2,048

5 0
3 years ago
What is the answer to this?​
Pie

Answer:

the third one

Step-by-step explanation:

p n p is p

p n q is p

q n q is q

q n p is p

p: true

q: false

got it?

6 0
3 years ago
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