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sertanlavr [38]
3 years ago
12

In a study of a gender selection method used to increase the likelihood of a baby being born a​ girl, 2086 users of the method g

ave birth to 1019 boys and 1067 girls. There is about a 15​% chance of getting that many girls if the method had no effect.
Because there is a 15% chance of getting that many girls by chance, the method( )

A, has statistical significance
B, has parctical significance
C, does not have statistical significane
D, does not have parctical significance
Mathematics
1 answer:
kipiarov [429]3 years ago
6 0

Answer:

C : does not have statistical significance

Step-by-step explanation:

Because there is a 15% chance of getting that many girls by chance, the method - does not have statistical significance.

By this method, the percentage of girls = 1067/2086=0.5115 or 51.15%

This type of method does not have practical significance.

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What is y=-4/3x +6. y=2
Mekhanik [1.2K]

The given equation is:
[/tex]y=-\frac{4}{3}x+6 [/tex] and we need to evaluate this for y=2.
So, first step is to plug in 2 for y in the above equation. Therefore,

2=-\frac{4}{3} x+6
2*3=-\frac{4}{3} x*3+6*3 Multiply each sides by common denominator 3
6=-4x+18
6-18= -4x Subtract 18 from each sides.
-12=-4x
-\frac{12}{-4} =-\frac{4x}{-4}
So, x=3

5 0
3 years ago
If $149 is shared between Grace and Precious so that Grace gets $20 more than twice what Precious gets. How much does Precious g
docker41 [41]
Precious gets $54.50 and Grace gets $94.50
8 0
3 years ago
Trey evaluated 12/15 + 1/10 and got an answer of 13/25 . Which statement is true about his answer?
alisha [4.7K]
You haven't posted the answer choices, but Trey got the wrong answer.

The denominators must be the same in order to add the fractions. In this case, the denominators 15 and 10 are different. We cannot add in this current state.

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6 0
3 years ago
Read 2 more answers
Hi please help me thanksss<br>pls provide workings too thanks :)​
anygoal [31]

Step-by-step explanation:

Search for questions & chapters

Class 11

>>Maths

>>Trigonometric Functions

>>Trigonometric Equations

>>Solve for x: sin x + sin 2x...

Question

Bookmark

Solve for x:sinx+sin2x+sin3x=cosx+cos2x+cos3x in the interval 0≤x≤2π.

Medium

Solution

verified

Verified by Toppr

We write the given equation as

(sinx+sin3x)+sin2x=(cosx+cos3x)+cos2x

or 2sin2xcosx+sin2x=2cos2xcosx+cos2x

or sin2x(2cosx+1)=cos2x(2cosx+1)

or (sin2x−cos2x)(2cosx+1)=0

∴sin2x−cos2x=0 or 2cosx+1=0

If sin2x−cos2x=0, then tan2x=1,

Hence 2x=nπ+π/4

or x=(4n+1)

8

π

.(1)

If 2cosx+1=0, then cosx=−1/2 (2)

∴x=2nπ±

3

2π

or x=

3

6n±2

π

We seek values of x in the interval 0≤x≤2π

In this interval (1) gives

x=π/8,5π/8,9π/8,13π/8. (n=0,1,2,3)

and (2) gives x=2π/3,4π/3. (for n=0,1)

Thus we get the answer

x=π/8,5π/8,2π/3,9π/8,4π/3,13π/8.

4 0
3 years ago
Which rational number is one tick mark to the right of Negative StartFraction 6 Over 4 EndFraction on the number line below?
melomori [17]

Answer:

the answered is a

Step-by-step explanation:

hope this helps

5 0
3 years ago
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