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kirza4 [7]
4 years ago
12

Match the functions in the pictures below

Mathematics
1 answer:
My name is Ann [436]4 years ago
7 0
\sin \binom{4\pi}{11} = \sin \binom{7\pi}{11}

\sin( \binom{3\pi}{11} ) = \sin( \binom{8\pi}{11} )

[tex] \sin( \binom{10\pi}{11}) = \sin( \binom{\pi}{11}) [\tex]

[tex] \sin( \binom{6\pi}{11}) = \sin( \binom{5\pi}{11}) [\tex]
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You select a random sample of n=14 families in your neighborhood and find the following family sizes (number of people in the fa
satela [25.4K]

Answer:

a. Best estimate for the mean family size for the population of all families in a country is 16.3571428571

b. 95% confidence interval for the estimate is 16.3571428571±0.7106240840. That is between 15.6465187731 and 17.0677669411

c. The sample is unlikely to be very representative of all families in a country.

Step-by-step explanation:

a. mean family size for the population of all families in a country can be estimated as sample mean, and calculated as:

\frac{15+ 16+ 19+ 18+ 17+ 15+ 16+ 16+  15+ 16+  15+ 16+ 17+ 18 }{14} ≈ 16.3571428571

b. 95% confidence interval for the estimate can be calculated using the equation CI=M± \frac{t*s}{\sqrt{N} } where

  • M is the mean estimate (16.3571428571)
  • t is the corresponding statistic in the 95% confidence level and with 14 degrees of freedom (2.160)
  • s is the standard deviation of the sample (1.2309777100)
  • N is the sample size (14)

s can be calculated as square root of mean squared differences from the sample mean.

Thus 95% CI=16.3571428571± \frac{2.160*1.2309777100}{\sqrt{14} } ≈ 16.3571428571±0.7106240840

The sample is unlikely to be very representative of all families in a country because as the sample data increases, estimate will improve.

7 0
3 years ago
Read 2 more answers
Quadrilateral ABCD is rotated 90° about the origin. What are the coordinates of quadrilateral A’B’C’D?
dlinn [17]

Answer:

A

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Write a system o three equations in three variables that has (3,5,2) as a solution.
Neko [114]
Solutions: x=3 , y=5 , z=2
x+y+z=10
2x-5y+2z=-15
4x+y-z=15
3 0
4 years ago
Read 2 more answers
12x² + 9x² =<br> A. 21x²²<br> B. 21x<br> C. 22x²<br> D. 22xA
Gnesinka [82]

Answer:

21x²

Step-by-step explanation:

hopefully A is a typo

3 0
2 years ago
Read 2 more answers
The quadratic function f(x)=x^2 has how many zeros
sp2606 [1]

Given:

The quadratic function is

f(x)=x^2

To find:

The number of zeros.

Solution:

We know that,

Number of zeros of a polynomial = Degree of the polynomial.

We have, a quadratic function is

f(x)=x^2

Here, degree of function is 2.

For zeros f(x)=0.

x^2=0

x=0

Therefore, the number of zeros of given quadratic function is 2 which are 0 and 0.

7 0
3 years ago
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