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
aleksandr82 [10.1K]
3 years ago
5

The Statistical Bulletin published by Metropolitan Life Insurance Co. reported that 2% of all American births result in twins. I

f a random sample of 8000 births is taken, find the mean, variance, and standard deviation of the number of births that would be result in twins
Mathematics
1 answer:
nikdorinn [45]3 years ago
8 0

Answer:

mean = 160

Variance = 156.8

Standard deviation = 12.52

Step-by-step explanation:

This is solved by the binomial distribution model for approximation.

n = number of random sample in which for this question, n= 8000

p = probability of success = 2% = 0.02

Mean of the sample = Expected value which approximates the average number of cases to expect from the larger sample chosen.

Mean = np = 0.02 × 8000 = 160

Variance = np(1-p) = 160(1-0.02) = 156.8

Standard deviation = √variance = √156.8 =12.52

You might be interested in
1/6+1/12=<br><img src="https://tex.z-dn.net/?f=1%20%5Cdiv%206%20%2B%201%20%5Cdiv%2012" id="TexFormula1" title="1 \div 6 + 1 \div
erica [24]

\frac{1}{6} + \frac{1}{12}


We know that:


\frac{a}{b} + \frac{c}{d} = \frac{a.d + b.c}{bd}


So,


\frac{1}{6} + \frac{1}{12} = \frac{1.12+6.1}{6.12}

\frac{12+6}{72}

\frac{18}{72}

\frac{9}{36}

\frac{3}{12}

\frac{1}{4}

8 0
3 years ago
What is the estimate of 212,514+396,705
Evgesh-ka [11]
Change 212,514 into 215,000.

Change 396,705 into 400,000.

--------

Estimate:

215,000 + 400,000 = 615,000

Therefore:

212,514 + 396,705 ≈ 615,000
4 0
3 years ago
Ifx &lt;5 and x &gt; C, give a value of c such that there
professor190 [17]

Answer:

For c=5 there are not solutions for the compound inequality

Step-by-step explanation:

we know that

In the compound inequality

x < 5 -----> inequality A

x > c -----> inequality B

The solution of the system of inequalities must satisfy inequality A and must satisfy inequality B

so

If c=5

then

There is no solution that satisfies both inequalities simultaneously.

therefore

For c=5 there are not solutions for the compound inequality

4 0
3 years ago
Which of the following ordered pairs are y-intercepts? Check all that apply
Varvara68 [4.7K]

A y-intercept is the value at which x = 0.

(4,0) is not a y-intercept because x = 4.

(-1, 1) is not a y-intercept because x = -1.

(0,0) is a y-intercept because x = 0.

(0, -7) is a y-intercept because x = 0.

(-2, 2) is not a y-intercept because x = -2.

(0, -0.25 is a y-intercept because x = 0.

8 0
3 years ago
Read 2 more answers
What is the value of this?
Alina [70]

Answer:

8

Step-by-step explanation:

4³ ÷ 2³

= 64 ÷ 8

= 8

7 0
3 years ago
Other questions:
  • 34.1 ÷ 5.5 i need an explanation on this math problem how to break it down
    15·1 answer
  • HEEEEEEEEEEEEEEEELLLLLLLLLLLLLP :(
    9·1 answer
  • (6,-1) and y = – 1/3x+ 1<br> y = 3x + [?]
    7·1 answer
  • Traveling carnivals move from town to town, staying for a limited number of days before moving to the next stop. The management
    13·2 answers
  • The video store just increased the price of renting a game by 1.25. Write a formula that will help Seth determine how much he'll
    15·1 answer
  • Help me out?? thank you so much whoever does!!
    15·1 answer
  • The measures of angle 1 and angle 2 are 30% and 45% of the sum of the angle measures of the triangle. Find the value of x. ASAP
    6·2 answers
  • What is the rate of change of the function y = 2x-3y=2x−3?
    10·1 answer
  • A bottle of water is 2/3 full. You drink the given portion of
    5·2 answers
  • tavon has a $15 gift card that lose $3 for 30- day period It is not used. he has a $40 that loses $1.50 for each day period it i
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!