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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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An earthquake wave travels through 55 km of rock in 25 seconds . Which equation represents the relationship between t, the numbe
ira [324]

Answer:

2.2 m/s

Step-by-step explanation:

Step one

Given data

An earthquake wave travels through 55 km

hence distance = 55 km

time taken = 25 seconds

<u>Required</u>

<u>the expression relating t and d</u>

Step two:

we know that velocity is

Speed= distance/time

speed= 55/25

Speed= 2.2 m/s

6 0
3 years ago
Y = x^3 + 5x^2 + 3x x= -3
dexar [7]

Answer:

9

Step-by-step explanation:

-3^3 +5*(3)^2 +3*-3

-27+5*9+(-9)

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8 0
2 years ago
Read 2 more answers
3y - 5z = -23
leonid [27]
Starting off, we can multiply the third equation by 2 and add it to the third to get rid of both the x and y variables. Next, we get z=1. Plugging that into 3y-5z=-23, we get 3y-5=-23. Adding 5 to both sides, we get 3y=-18. After that, we can divide both sides by 3 to get y=-6. Plugging that into -2x-y-z=-3, we get -2x+6-1=-3=-2x+5. Subtracting 5x from both sides, we get -2x=-8. After that, we can divide both sides by -2 to get x=4.
8 0
3 years ago
Translation: 6 units right and 3 units down<br> s(-3, 3), C(-1, 4), W(-2,-1)
sdas [7]
S (3, 0)
C (5, 1)
W (4, -4)

Explanation
You take the first number and add 6 to it and you get the new number and then you take the second number and subtract 3 from it

S: -3 + 6 = 3
S- 3 - 3 = 0

C: -1 + 6 = 5
C: 4 - 3 = 1

W: -2 + 6 = 4
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3 0
2 years ago
7s0t-5/2-1m2 simplify
Mars2501 [29]
<span>The answer should be 14t - 2m2 - 5/2 , if I am correct</span>
6 0
3 years ago
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