1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Artist 52 [7]
2 years ago
10

A normal population has a mean of 20.0 and a standard deviation of 4.0.

Mathematics
1 answer:
Tanya [424]2 years ago
3 0
<h2><em>a) </em><u>The z-value associated with 25.0</u></h2><h2>Z = 1.25</h2><h2 /><h2><em>b)</em> <u>proportion of the population is between 20.0 and 25.0 is</u></h2><h2>Proportion = 0.3944</h2><h2 /><h2><em>c)</em> <u>proportion of the population is less than 18.0 is</u></h2><h2>Proportion = 0.3085</h2>

Calculations:

Normal pop has mean of 20.0

standard deviation = 4.0

XNN(20.0, 4.0)

a).

z=\frac{x-h}{z}

=\frac{25-20}{4.0} =\frac{5}{4} =1.25

<u>Z = 1.25</u>

<u></u>

b).

The proportion between 20 and 25 is P(20 <x<25.0)

=p(\frac{20-20}{4} < z < \frac{25-0}{4} )

=P(0 < z < 1.25)

=P(Z < 1.25)-P(z < 0)

=0.8944-0.5000

P(20 < x < 25)=0.3944

c).

The proportion value is less than 18 when

P(x < 18)=p(\frac{x--4}{6} < \frac{18-20}{4}

=P(z < \frac{-2}{4})

=P(z < -0.5)

P(x<18) = 0.3085

You might be interested in
40 multiply 10=4 multiple
leva [86]
40  the answer i think
6 0
2 years ago
When a number is a multiple of 6, what are the possible values for the ones digit?
Leokris [45]
Only 6 i believe but idrk
4 0
3 years ago
A flower pot has a circumference of 47 inches. What is the approximate length of the radius of the flower pot? Use 3.14 for .
Rainbow [258]

Answer:

7.48

Step-by-step explanation:

C=2πr

Solving for

r=C

2π=47

2·π≈7.48028

6 0
2 years ago
Read 2 more answers
Answer the following answer this for me please I need help.
scoray [572]
Since the square root of 13 is something really weird (3.6055 something) and does not have a clear end or repeats, it is irrational. Solve for the number before assuming anything
5 0
2 years ago
Plsss help meee!!!!!!​
Lina20 [59]

Answer:

  • given below

Step-by-step explanation:

1)

total area = rectangle area + 2 triangle area

                =  length * width = 2 ( \frac{1}{2} * base * height )

                =  7.5 * 6 + 2 (  \frac{1}{2} * 3 * 4 )

                = 57 ft²

2)

separate it into two rectangles:

length * width + length * width

  6  *   2  +  9 * 4

      48 cm²

3)

parallelogram area =  base * height

                                = 20 * 25

                                 = 500 in²

6 0
2 years ago
Other questions:
  • Find the area of the irregular shape
    9·2 answers
  • What is the greatest common divisor of $1665,$ $4554,$ $1683,$ and $4050$?
    15·2 answers
  • If u get an 81 which is a B in ur English class and then ur teacher gives u an assignment u then get a 88 ℅ she then puts it in
    8·2 answers
  • Suppose f(x)=6x-2 and g(x)=2x+4). Find each of the following functions.
    7·1 answer
  • Find the image of triangle GHJ under the translation of (X,Y) ——&gt; ( x-1, y-8)
    13·2 answers
  • Can someone do this for me
    14·2 answers
  • The graph of linear functions passes through the points (10,2) and
    12·1 answer
  • Two trains leave Raleigh at the same time one traveling north and the other south the first train travels at 50 miles per hour a
    10·1 answer
  • HELP ASAP PLEASE
    12·2 answers
  • Will give brainliest <br><br>geometry<br><br>50 points <br>​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!