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pantera1 [17]
3 years ago
11

Three randomly selected households are surveyed. /The numbers of people in the households are 1, 3, and 8. Assume that samples o

f size n =2 are randomly selected with replacement from the population of 1, 3, and 8. Listed below are the nine different samples
1,1 ; 1,3 ; 1,8 ; 3,1 ; 3,3 ; 3,8 ; 8,1 ; 8,3 ; 8,8


Find the variance of each of the nine samples then summarize the sampling distribution of the variances in the format of a table representing the probability distribution of the distinct variance values


s^2 Probability

3.3

1

6.3

49
Mathematics
1 answer:
inn [45]3 years ago
8 0
The question is asking to find the variance for the said samples in the problem ans use the sample data to determine each variance, and base on my further computation and further calculation, I would say that the answer would be the following:
#1. 3.3 -> 1 and 3 -> 2/9
#2. 1-> 0->3/9
#3. 6.3 - > 8 and 3-> 2/9
#4 49-> 1 and 8-> 2/9
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Which one of These is a rational number
Ainat [17]

Answer:

OPTION D: 0

Step-by-step explanation:

Rational numbers are subset of real numbers. These are the numbers that can be represented by a ratio of two integers i.e., of the form $ \frac{p}{q} $, where 'q' is non-zero. The numbers after the decimal forms a pattern. Since, 'q' can be equal to 1, we conclude all integers are rational numbers.

Irrational numbers are the numbers which cannot be represented as ratios. They can only be represented as an approximate value. The numbers after the decimal do not form a pattern.

Here, A is 11.761038... Clearly, the decimal is non-terminating and does not follow a pattern.

In Option B we have √20. √20 = √2 . √10. We know that √2 is an irrational number. So, √20 is also irrational.

In Option C, we have the famous $ \pi $. The value of $ \pi $ is 3.14.... It is an irrational number. The approximate representation of $ \pi $ is $ \frac{22}{7} $.

In Option D, we have 0. It is an integer. So, it is rational as well.

6 0
4 years ago
Jenny is organising a barbecue. There are 30 bread rolls in a pack. There are 16 sausages in a pack. She needs exactly the same
ryzh [129]

Answer:

She need to buy 8 packs of rolls and 15 packs of sausages! The LCM is 240 so you would need to find out how many packs or rolls and how many packs of sausages equal 240!

Step-by-step explanation:

6 0
3 years ago
The area of a square is 128x3y4 cm2. What is the length of one side of the square in simplest form
AlekseyPX

Answer:

We know that the area of the square of side length L is:

A = L*L = L^2

In this case, we know that the area is:

A = 128*x^3*y^4 cm^2

Then we have:

L^2 = 128*x^3*y^4 cm^2

If we apply the square root to both sides we get:

√(L^2) = √( 128*x^3*y^4 cm^2)

L = √(128)*(√x^3)*(√y^4) cm

Here we can replace:

(√x^3) = x^(3/2)

(√y^4)  = y^(4/2) = y^2

Replacing these two, we get:

L = √(128)*x^(3/2)*y^2 cm

This is the simplest form of L.

7 0
4 years ago
ALGEBRA
Dafna11 [192]

Answer: g(x)=\frac{1}{2}f(x)

Step-by-step explanation:

We see that g(x) is a straight line that passes through the origin, just like f(x), so g(x)=kx for some constant k.

Since g(x) passes through (4,2), we know that 2=4k, and thus k=1/2.

So, \boxed{g(x)=\frac{1}{2}f(x)}

3 0
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Vertical angles are always congruent <br>true or false​
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If two angles are vertical angles, then they're congruent
5 0
3 years ago
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