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
Someone please help me out
anastassius [24]
405 because 120+50+65=405
4 0
3 years ago
"-3x" + 5 < "-10" Inequality 2: 7x + x - 4 > 28 Which of the following values makes BOTH inequalities TRUE? Select all tha
zysi [14]

Answer:

12, 23, 48, 325

Step-by-step explanation:

So, when given two inequalities and asked to find the values that make both true, it is considered a system of equations. To solve a system of equation, you have to graph the inequalities and find where they intersect.

Inequality 1:

(-3x) + 5 < (-10)

Inequality 2:

7x + x - 4 > 28

simplifies to: 8x - 4 > 28

When graphed, the inequalities don't intersect, but rather have a similar shaded area overlapping from the point of 5 and greater.

Answers that apply from given list would be:

12, 23, 48, 325

6 0
3 years ago
Which one is greater 2/3 or 4/5
Reptile [31]

2/3 because it’s out of 3, if you cut a pizza in 3 slices the slices are bigger and if u take 2 out of the three the remaining piece is bigger than the 4/5 because those 5 pieces will be cut smaller

3 0
3 years ago
Read 2 more answers
I need help with my math homework. <br> Find the slope of each line.<br> Thanks!
guajiro [1.7K]
7 is infinite 6 is 4/3 5 is zero 4 is negative 5/4
6 0
3 years ago
When the input is -5 the output is ___?
LuckyWell [14K]

Answer:

30

Step-by-step explanation:

f(-5) = -7(-5) - 5

= 35 - 5 = 30

8 0
3 years ago
Other questions:
  • Solve the equation.
    13·2 answers
  • Can someone please figure out the first one, I already got the second one. I need help with the first one.
    14·2 answers
  • Taking a discount of 50% off followed by a discount of 50% off results in a total discount of _____.
    9·1 answer
  • 60.8 is what percent of 32
    5·1 answer
  • What is the order of the numbers form least to greatest?
    8·2 answers
  • Which ordered pair is a solution for the system of equations?
    15·1 answer
  • Rational functions v and w both have a point of discontinuity at x = 7. Which equation could represent function w?
    5·1 answer
  • Find the geometric mean of 4 and 8? please i will give you good rating
    10·1 answer
  • Solve the equation, write the one solution, No solution and Infinitely Many Solution.
    10·1 answer
  • 6 cupcakes for £5 or 4 cupcakes for £3.50​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!