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Ivahew [28]
3 years ago
13

The meaning of significance. Asked to explain the meaning of "statistically significant at the α=0.05 level," a student says: "T

his means that the probability that the null hypothesis is true is less than 0.05." Is this explanation correct? Why or why not?
Mathematics
1 answer:
Irina18 [472]3 years ago
3 0

Answer:

This explanation is not correct

Explanation:

Significance level is the probability that the null hypothesis rejected is in fact true. If we say there is a significance level of 0.10 or 10%(α=0.10 level) then there is a 10% chance of incorrectly rejecting the null hypothesis when there is actually no difference.

If we wish to reach a conclusion on rejection or acceptance of the null hypothesis, we could use the p value(the probability that observed results or more extremee results are true given null hypothesis)which we compare with the significance level to conclude. If the significance level is 0.10 and p value is 0.07(since p value is less than significance level) , we reject the null hypothesis and vice versa.

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Find the value of the variables in the simplest form
Mrrafil [7]

Answer:

x = 2

Step-by-step explanation:

Using Pythagoras' identity in the right triangle

x² + x² = (2\sqrt{2} )² , that is

2x² = 8 ( divide both sides by 2 )

x² = 4 ( take the square root of both sides )

x = \sqrt{4} = 2

8 0
3 years ago
What is 3 3/5 - 4 1/2
PolarNik [594]
3 3/5. - 4 1/2


find a common denominator

3/ 5 = 6/ 10.

1/2. = 5/10


3 6/10. - 4 5/10



- 1 1/10
3 0
4 years ago
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Need help with question 13B i can not figure it out please help.
Vsevolod [243]
Short Answer 10
The tough part is the number of drinks.
Let the number of them be x
4.5 x + 3 + (10/100) * (4.5x + 3) + (7/100) * (4.5 x + 3) ≤  60

The tip is not included in the tax, and the tax does not include the tip. You can shorten this up quite a bit.
4.5 x + 3 + (10/100) * (4.5x + 3) + (7/100) * (4.5 x + 3) ≤  60
(1 + 10/100 + 7 /100) (4.5x + 3) ≤  60     Combine the tax, tip, scone and Lattes 

(1.17) * (4.5x + 3) ≤ 60                            Divide by 1.17
4.5x + 3 ≤ 60 / 1.17 
4.5x + 3 ≤ 51.28                                      Subtract 3
4.5x ≤ 48.28                                            Divide by 4.5
x ≤ 48.28 / 4.5
x ≤ 10.72 

Discussion.
There's a problem. He can't buy 0.72 of a Latte. He can only buy 10 of them. In this case we must round down so what happens if he buys 10 lattes? Does the price the taxes and the tip allow him to get another Latte? The answer should be no because then you would be 11 lattes and the tip and taxes would push you over 60 dollars. But be careful, sometimes things like this can alter you answer.. 

Answer: 10 <<<<
7 0
3 years ago
The Dirk family tips their newspaper carrier for delivering the newspaper. They tip 10% of what they pay for the subscription. T
iragen [17]

Answer:

38

Step-by-step explanation:

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18+20

= 38

4 0
3 years ago
Use front-end rounding to estimate the sum:
SashulF [63]

Answer:

Ermm there no question bud, whats the question?

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