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
Nastasia [14]
3 years ago
9

What is the probability of selection for any man in a proportionate random sample, where a sample of 100 will be drawn from a po

pulation of 1,000 that is 50% male and 50% female?
Mathematics
1 answer:
kolbaska11 [484]3 years ago
7 0
Working Principle: Stratified Random Sampling

nx = (Nx/N)*n

where:
    nx = sample size for stratum x
    Nx = population size for stratum x
    N = total population size 
    n = total sample size

Given:

  Nx = 100
  N = 1000
  n = 0.5*(1000) = 500

Required: Probability of Man to be selected

Solution:

nx = (Nx/N)*n
nx = (100/1000)*500 = 50 men

ny = (Nx/N)*n
ny = (100/1000)*500 = 50 women


Probability of Man to be selected = nx/(nx + ny)*100 = 50/(50+50)*100 = 50%

<em>ANSWER: 50%</em>
You might be interested in
Evaluate the sum from n equals five to nine of quantity three n plus two
goldfiish [28.3K]

Answer:

The given expanded sum of the series is \sum\limits_{n=5}^{9}3n+2=115

Step-by-step explanation:

Given problem can be written as

\sum\limits_{n=5}^{9}3n+2

To find their sums:

Now expanding the series

That is put n=5,6,7,8,9 in the given summation

\sum\limits_{n=5}^{9}3n+2=[3(5)+2]+[3(6)+2]+[3(7)+2]+[3(8)+2]+[3(9)+2]

=[15+2]+[18+2]+[21+2]+[24+2]+[27+2]

=17+20+23+26+29  (adding the terms)

=115

Therefore \sum\limits_{n=5}^{9}3n+2=115

Therefore the given sum of the series is \sum\limits_{n=5}^{9}3n+2=115

The given expanded sum of the series is \sum\limits_{n=5}^{9}3n+2=115

6 0
3 years ago
Help i only have 2 more questions and im done with this quiz
kvv77 [185]

{d}^{2}  \div (4c) - b + 5a \\  =  {(8)}^{2}  \div( 4 \times 2) - 3 + 5 \times  \frac{1}{5}  \\  = 64  \div 8 - 3 + 1 \\  = 8 - 3 + 1 \\  = 9- 3 \\  = 6

<u>Answer</u><u>:</u>

6

Hope you could understand.

If you have any query, feel free to ask.

6 0
3 years ago
Select all the equations where r 3 is a solution.​
lozanna [386]

Answer:

The right answers are 1,4 and 6

6 0
3 years ago
Read 2 more answers
Can someone plz help me?
n200080 [17]
The equation of the line best fit is y=35, x= 20
no practice, student expcted to type 20 wpm
every minute spent practicing typing speed increased by 1/2  word per minute
4 0
3 years ago
Read 2 more answers
Pam runs 50 meters in 12 seconds, how far can she run in 7 seconds?
podryga [215]

Answer: 30 meters

Step-by-step explanation:

50/12=4.1666

4.1666x7=29.162 round it to 30

5 0
3 years ago
Read 2 more answers
Other questions:
  • 1.the science club went on a two day field trip the first day the members
    11·1 answer
  • Steve changed $600 US dollars into 480 Euros. How many Euros did he receive for each US dollar?
    12·2 answers
  • 30 POINTS!!! Use the formula V = s³, where V is the volume and s is the edge length of the cube, to solve this problem. A cube-s
    7·1 answer
  • How many hours are in 186 minutes express this as a mixed number and as a decimal
    12·1 answer
  • The proper units of weight in metric system
    14·1 answer
  • a table was sold at 20%loss but had it sold for RS 160 more these would have been a profit 20%. find cp​
    15·1 answer
  • Apply the distributive property to factor out the greatest common factor;40j -16​
    13·2 answers
  • What is an algebraic expression for "2 less than the product of 3 and a number x"? *
    8·1 answer
  • -2(t+7)=-4t+12 what is the value of t
    9·1 answer
  • In triangle QRS the measure of angle RSQ is 50 degrees , and the measure of angle QRS is 37 degrees. What is the measure of angl
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!