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Studentka2010 [4]
3 years ago
15

Marcus stacked 2

Mathematics
2 answers:
harkovskaia [24]3 years ago
8 0

Answer:

2 feet

Step-by-step explanation:

Since each piece of wood is 2/3 of a foot tall, and there are two pieces of wood stacked on top of each other, you need to add 2/3 twice to get the total height of the pile.

2/3 + 2/3 = 6/3

6/3 = 2

Therefore, the pile is 2 feet tall.

sladkih [1.3K]3 years ago
8 0

2/3 + 2/3 = 6/3

6/3 = 2 so, his pile was 2ft

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A book claims that more hockey players are born in January through March than in October through December. The following data sh
astra-53 [7]

Answer:

\chi^2 = \frac{(67-47.5)^2}{47.5}+\frac{(56-47.5)^2}{47.5}+\frac{(30-47.5)^2}{47.5}+\frac{(37-47.5)^2}{47.5}=18.295

Now we can calculate the degrees of freedom for the statistic given by:

df=(categories-1)=4-1=3

And we can calculate the p value given by:

p_v = P(\chi^2_{3} >18.295)=0.00038

Since the p value is very low we have enough evidence to reject the null hypothesis and we can conclude that the players' birthdates are not uniformly distributed throughout the​ year

Step-by-step explanation:

We need to conduct a chi square test in order to check the following hypothesis:

H0: There is no difference of birthdates distributed throughout the​ year

H1: There is a difference between birthdates distributed throughout the​ year

The level of significance assumed for this case is \alpha=0.05

The statistic to check the hypothesis is given by:

\sum_{i=1}^n \frac{(O_i -E_i)^2}{E_i}

The table given represent the observed values, we just need to calculate the expected values with the following formula E_i = \frac{total}{4}

And replacing we got:

E_{1} =\frac{67+56+30+37}{4}=47.5

And now we can calculate the statistic:

\chi^2 = \frac{(67-47.5)^2}{47.5}+\frac{(56-47.5)^2}{47.5}+\frac{(30-47.5)^2}{47.5}+\frac{(37-47.5)^2}{47.5}=18.295

Now we can calculate the degrees of freedom for the statistic given by:

df=(categories-1)=4-1=3

And we can calculate the p value given by:

p_v = P(\chi^2_{3} >18.295)=0.00038

Since the p value is very low we have enough evidence to reject the null hypothesis and we can conclude that the players' birthdates are not uniformly distributed throughout the​ year

3 0
4 years ago
What’s the value of x???
egoroff_w [7]

Answer:

i believe it would be d square root of 17

6 0
4 years ago
What type of symmetry does the figure have?
maksim [4K]

Answer:

non of the above.

Step-by-step explanation:

It's not a regular shape-

7 0
3 years ago
Read 2 more answers
What is 3 2/3 plus 4 2/5
kvv77 [185]

Answer:

121/15

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Need help asap please!!!
Alona [7]

Answer:

-6,-4

Step-by-step explanation:

The coordinates of the point is -2,2 so you subtract 4 and 6. That is -6.-4

Hope this helps plz mark brainliest :D

6 0
3 years ago
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