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3 years ago

What does it mean if the probability is 20% that a spinner will stop in a red section?

Mathematics

1 answer:

Kaylis [27]3 years ago

4 0

20% = 20/100 = 1/5

Hence, there is one chance in five that the spinner will stop in a red section.

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Which side lengths form a right triangle chose all that apply

KengaRu [80]

Answer:

Step-by-step explanation:

only b is true

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3 years ago

On his first try, Andrew kicked a kickball 21 feet. On his second try, he kicked it 4 times as far. How far did he kick it the s

natulia [17]

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84 feet D

Step-by-step explanation:

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3 years ago

Read 2 more answers

Write the number that is 10 more than 98 complete this number sentence. 12 is 1 more than --- and 1 less than ---

AVprozaik [17]

98 + 10 = 108

12 is 1 more than 11

and 1 less than 13

Hope this helps!

3 0

3 years ago

Which expression is equivalent to 4n+ 28 A 28n + 4 B 4(n+28) C 4( +7) D 32

Eva8 [605]

Answer:

It would be B

Step-by-step explanation:

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3 years ago

Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is µd =

ahrayia [7]

Answer:

d: 2, 4, -6, 0, -1, -5, 0, 1

The second step is calculate the mean difference

$\bar d= \frac{\sum_{i=1}^n d_i}{n}= \frac{29}{8}=-0.625$

The third step would be calculate the standard deviation for the differences, and we got:

$s_d =\frac{\sum_{i=1}^n (d_i -\bar d)^2}{n-1} =3.378$

The next step is calculate the statistic given by :

$t=\frac{\bar d -0}{\frac{s_d}{\sqrt{n}}}=\frac{-0.625 -0}{\frac{3.378}{\sqrt{8}}}=-0.523$

And the correct option would be:

a. t = -0.523

Step-by-step explanation:

We assume the following notation:

x=test value after , y = test value before

x: 34 39 28 33 27 23 35 33

y: 32 35 34 33 28 28 35 32

The system of hypothesis for this case is given by:

Null hypothesis: $\mu_y- \mu_x = 0$

Alternative hypothesis: $\mu_y -\mu_x \neq 0$

The first step is calculate the difference $d_i=y_i-x_i$ and we obtain this:

d: 2, 4, -6, 0, -1, -5, 0, 1

The second step is calculate the mean difference

$\bar d= \frac{\sum_{i=1}^n d_i}{n}= \frac{29}{8}=-0.625$

The third step would be calculate the standard deviation for the differences, and we got:

$s_d =\frac{\sum_{i=1}^n (d_i -\bar d)^2}{n-1} =3.378$

The next step is calculate the statistic given by :

$t=\frac{\bar d -0}{\frac{s_d}{\sqrt{n}}}=\frac{-0.625 -0}{\frac{3.378}{\sqrt{8}}}=-0.523$

And the correct option would be:

a. t = -0.523

5 0

4 years ago