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
lakkis [162]
1 year ago
8

A normal population has a mean u = 31 and standard deviation = 10. What proportion of the population is less than 30?​

Mathematics
1 answer:
natulia [17]1 year ago
4 0

The proportion of the population exists less than 30 then

(x< 30) = 0.986.

<h3>How to estimate the proportion of the population that exists less than 30?​</h3>

To estimate the z-score using the formula, z = (x - µ)/σ

Where, x be the randomly chosen values = 30

µ be the mean = 31

σ be the standard deviation = 10

Proportion of the population that exists less than 18 = P(x < 30)

Plug in the values into z = (x - µ)/σ, to get z-score.

Substitute the values in the above equation, we get

z = (30 - 31)/10

z = -1/10 = -0.1

Therefore, the value of z = - 0.1.

To learn more about proportion of the population refer to:

brainly.com/question/18403865

#SPJ9

You might be interested in
the home of bill burton is assessed at $91,000. the tax rate is 18.5 mills. what is the property tax on bills home?
IrinaVladis [17]

Answer:

  $1683.50

Step-by-step explanation:

You are expected to know that a "mill" is one thousandth of a dollar. In this context, it is the amount of tax on one dollar of assessed valuation. So, the tax amount is found by multiplying the valuation by 18.5/1000:

  tax = 0.0185 · $91,000 = $1683.50

6 0
3 years ago
Help me out please:)
stich3 [128]

Answer:

the answer is

(8.5,13.5)

5 0
2 years ago
A bag contains 30 red and blue marbles. If 19 are blue, what fraction of the marbles are blue?
Musya8 [376]

Answer:

19%

Step-by-step explanation:

19/100. i don't think it is that simple, but i did the best i could

5 0
2 years ago
3. What is the surface area of the triangular prism shown below?
jekas [21]

Answer:

1233cm^2

Step-by-step explanation:

a of triangle = 1/2 bh

1/2 x 12 x 9 = 54

108 x 2 = 108

a of regtangle = l x w

25 x 15 = 375

375 x 3 = 1125

total surface area = 1125 + 108 = 1233cm^2

7 0
1 year ago
Johnetta simplified 7/9+ 3/8 her work is shown below. identify where she made an error
Sedbober [7]
She made an error in the STEP 1
she shouldnt multiply the numbers
4 0
2 years ago
Other questions:
  • Solve x^2 - x = 2 using the quadratic formula. Show your work.
    10·1 answer
  • the coordinates of point A are (6,-7) and the coordinates of point B are (-6,2) point M is the midpoint of AB find the coordinat
    8·1 answer
  • Can somebody please check these? I'm struggling on this. If I'm wrong please correct me.
    11·1 answer
  • 3(x + 1) - 2x = -6 what is X i need halp
    5·2 answers
  • Skylar and Rodrigo each recorded how far they traveled while skateboarding. Skylar traveled 65 feet in 5 seconds and Rodrigo tra
    12·1 answer
  • Distance for 3 minutes and at the speed of 17m/s​
    5·1 answer
  • If you intend to borrow 20 percent of the $174,500 you need to start a business, how much
    13·1 answer
  • Evaluate (1002 - 187)<br>Given that 3 x 91+x=27*. find x​
    11·2 answers
  • Cómo afectan los sistemas económicos (socialismo y capitalismo) a la matemática?
    13·1 answer
  • What is the equation in point-slope form of a line that passes through the points (−4, −1) and (5, 7) ?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!