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lesya692 [45]
3 years ago
7

The dispersion among sample means is less than the dispersion among the sampled items themselves becausea:______

Mathematics
1 answer:
german3 years ago
5 0

Answer:

The dispersion among sample means is less than the dispersion among the sampled items themselves because:______

b. Very large values are averaged down

Step-by-step explanation:

The sample means represent average values obtained from both large and moderate values.  Through the process of averaging, the data values obtained as the sample means are much closer to the true values.  This is why the dispersions among the sampled items will be larger than the dispersions among the sample means.  Sample dispersions describe how spread out the data values are on the number line.

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2. Find the cosine function that is represented in the graph.
Diano4ka-milaya [45]

Answer:

f(x) = cos(x - \frac{\pi }{4} ) -1

Step-by-step explanation:

In this graph, we have the coordinate point (\frac{\pi }{4} , 0). Without translations, cos(0) = 0, which means that the graph is shifted to the right by \frac{\pi }{4}. We also know that the graph is shifted down by 1 because we have the point

(\frac{5\pi }{4} , -2), but accounting for the right shift, this point should really by (\pi , -2). cos(\pi) = -1, but on the graph it is -2, meaning that it is shifted down by 1.

Therefore, accounting for the right shift by \frac{\pi }{4} and the shift down by 1, our equation is f(x) = cos(x - \frac{pi}{4} ) - 1.

4 0
2 years ago
A factory makes rectangular sheets of cardboard, each with an area of 2 1 2square feet. Each sheet of cardboard can be cut into
hodyreva [135]

Answer:

2 1/7 pieces

Step-by-step explanation:

A factory makes rectangular sheets of cardboard, each with an area 2 1/2 square feet. Each sheet of cardboard can be cut into smaller pieces of cardboard measuring 1 1/6 square feet. How many smaller pieces of cardboard does each sheet of cardboard provide?

Each sheet of cardboard = 2 1/2 square feet

Each smaller pieces of cardboard = 1 1/6 square feet

Number of smaller pieces of cardboard per sheet of cardboard = Each sheet of cardboard ÷

Each smaller pieces of cardboard

= 2 1/2 square feet ÷ 1 1/6 square feet

= 5/2 ÷ 7/6

= 5/2 × 6/7

= (5*6) / (2*7)

= 30/14

= 15/7

= 2 1/7 pieces

Number of smaller pieces of cardboard per sheet of cardboard = 2 1/7 pieces

6 0
3 years ago
Find the 14th term of the geometric sequence 2,4,8
murzikaleks [220]

Answer:

8192 pretty sure

Step-by-step explanation:

4 0
3 years ago
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Simplify the imaginary number sqr -12
Anastaziya [24]

Answer:

\sqrt{-12} = i\sqrt{12} = i\sqrt{4\cdot 3} = 2i\sqrt{3}

Step-by-step explanation:

8 0
4 years ago
Can anyone help me with this
Sedbober [7]

Answer:

x=0, - 9

Step-by-step explanation:

x^2+9x=0

x(x+9)=0

x=0 or x=-9

8 0
3 years ago
Read 2 more answers
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