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
REY [17]
2 years ago
12

A normal population has mean =μ7 and standard deviation =σ5. (a) What proportion of the population is less than 18?

Mathematics
1 answer:
marshall27 [118]2 years ago
4 0

Answer:

P(x< 18) = 0.986

Step-by-step explanation:

Step 1: find the z-score using the formula, z = (x - µ)/σ

Where,

x = randomly chosen values = 18

µ = mean = 7

σ = standard deviation = 5

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

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

z = (18 - 7)/5

z = 11/5 = 2.2

Step 2: Find P(x< 18) = P (z<2.2) using z-table.

The probability that corresponds with z-score calculated is 0.986.

Therefore,

P(x< 18) = 0.986

You might be interested in
How I can write 680,705 in expanded form
KatRina [158]
600,000+80,000+700+5
5 0
3 years ago
Read 2 more answers
Anual is a word-processor operator. He makes N$12, 50 an hour. Determine his earnings for a week if he works for 48 hours.
Murrr4er [49]

Answer: $600

Step-by-step explanation:

Given

Anual makes \$12.50 an hour

For 48 hours, he makes

\Rightarrow 48\times 12.5\\\Rightarrow \$600

Thus, he will make $600 for 48 hours

6 0
2 years ago
Math question please help!! thank you if you help
algol [13]
These solutions can be called “roots”, “zeroes”, and “x-intercepts”.
6 0
2 years ago
Read 2 more answers
What is the reciprocal of -0.06
vekshin1

Answer:

-16.666

Step-by-step explanation:

You can find the reciprocal by turning the intended fraction upside down.

\frac{-0.06}{1} ⤭ \frac{1}{-0.06} = \frac{100}{-6} = \frac{50}{-3} = <em>-16.6666666667</em>

6 0
2 years ago
Read 2 more answers
756 divided by 36 <br> plz need help
Alenkasestr [34]

Answer:

21

Step-by-step explanation:

I did the math.

5 0
2 years ago
Read 2 more answers
Other questions:
  • cody is reading a 520-page book this summer. he read 1\5 of the pages on sunday. he read 1\2 of the pages on tuesday. he read th
    14·1 answer
  • What are the coordinates of the image of point (−1, 5) after a counterclockwise rotation of 90º about the origin?
    14·2 answers
  • True or False;
    14·2 answers
  • You collect a total of $160 in donations from three people. The three donations are in the ratio 5 : 5 : 10.
    10·1 answer
  • On Melissa's 6th birthday, she gets a $6000 CD that earns 3% interest, compounded semiannually. If the CD matures on her 13th bi
    13·1 answer
  • Factor x squared minus 9?
    15·1 answer
  • Determine the truth value of each statement based on the expression.
    8·1 answer
  • What is the value of 4 by 1 % of 800​
    13·1 answer
  • At an outdoor concert, there were 1,200 tickets sold. The tickets cost $20 each for lawn seats and $45 each for pavillion ticket
    11·1 answer
  • In the diagram, JKLM~EFGH. Find the scale factor of JKLM TO EFGH. Plz help
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!