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
murzikaleks [220]
3 years ago
11

Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby. Thi

s method is designed to increase the likelihood that each baby will be a​ girl, but assume that the method has no​ effect, so the probability of a girl is 0.5. Assume that the groups consist of 38 couples. Complete parts​ (a) through​ (c) below. a. Find the mean and the standard deviation for the numbers of girls in groups of 38 births.
Mathematics
1 answer:
PilotLPTM [1.2K]3 years ago
7 0

Answer:

a) Mean = 19

b) Standard Deviation = 3.08

Step-by-step explanation:

This is binomial probability distribution. We need to find the mean and standard deviation.

a) Mean

The formula for mean is:

Mean = np

Where n is the number of people, which is 38 and p is the probability of girl, which is 0.5

n = 38

p = 0.5

So,

Mean = np\\Mean = (38)(0.5)\\Mean = 19

Mean = 19

b) Standard Deviation

Standard deviation has the formula:

Standard \ Deviation= \sqrt{np(1-p)}

Where n and p are the same variables in part (a)

So we plug them in and find:

Standard \ Deviation= \sqrt{np(1-p)} \\Standard \ Deviation= \sqrt{(38)(0.5)(1-0.5)} \\Standard \ Deviation= \sqrt{38*0.5*0.5}\\ Standard \ Deviation= \sqrt{9.5}\\Standard \ Deviation= 3.08

Standard Deviation = 3.08

You might be interested in
Through (5,5) parallel to 5x-5
Crazy boy [7]

Answer:

y=5x-20

Step-by-step explanation:

For the equation y=5x-5, the slope is 5 and the slope of the new line will be 5 because parallel lines have the same slope. Use the point-slope form to write the equation, then simplify and convert into the slope intercept form.

(y-5)=5(x-5)

y-5=5x-25

y=5x-20



5 0
3 years ago
Read 2 more answers
Answer this question
slega [8]

The answer is 6

First, you must put the values in the formula.

a^2+b^2=c^2

a^2+8^2=10^2

Then, you must simplify the exponents.

a^2+64=100

Next, subtract 64 on both sides.

a^2+36

Finally, eliminate exponents.

\sqrt{a^2}=\sqrt{36}

a=6

7 0
4 years ago
If a smaller replica of the ferris wheel was constructed, what conclusions could you draw about the central angle of the origina
hoa [83]
The arc and the central angles will be the same.

If you were making a replica ferris wheel it would be similar to the larger ferris wheel. This means that all the angles would be the same. If the angles were the same, the arc measures would also be the same.
4 0
3 years ago
Read 2 more answers
8(3 – 2x)+ 4(3x – 2)=-16 <br>Can someone solve for x? please​
castortr0y [4]

Answer: x = 8

Step-by-step explanation:

8(3-2x) + 4(3x - 2) = -16

expanding the equation , we have

24 - 16x +12x - 8 = -16

16 - 4x = -16

collecting the like terms

4x = 32

x = 32/4

x = 8

4 0
4 years ago
Mary and Jane win $200, they share the amount in the ratio 3:2 . How much does Nary get and how much does Jane get?​
Alika [10]

Answer:

i don't know

Step-by-step explanation:

sorry

4 0
3 years ago
Read 2 more answers
Other questions:
  • Solve for r 2r-s/t=4
    10·1 answer
  • 12 points, please help me!
    6·1 answer
  • Pls help I’m getting really frustrated with this question
    9·1 answer
  • What is the following number in decimal form? 1.68 × 10^8
    8·2 answers
  • Why does dividing 5 by a decimal less than 1 give a quotient greater than 5
    7·1 answer
  • PLEASE HELP I DONT UNDERSTAND!!
    14·1 answer
  • in the diagram, a building casts a 35-ft shadow and a flagpole casts a 10-ft shadow. if the flagpole is 22tall, how tall is the
    5·1 answer
  • Please help with the steps
    12·1 answer
  • Copy and complete the input- output table for the function please help fast
    5·1 answer
  • graph the system of equations and determine the solution.6x - 3y = 34x - 2y = 8use the graphing tool to graph the system what is
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!