Mathematics High School

For which of these variables would you be interested in finding the biserial correlation coefficient rather than the point-biserial correlation coefficient?

Answers

Answer 1

Answer:

The formula for the point biserial correlation coefficient is:

point biserial correlation formula

M1 = mean (for the entire test) of the group that received the positive binary variable (i.e. the “1”).

M0 = mean (for the entire test) of the group that received the negative binary variable (i.e. the “0”).

Sn = standard deviation for the entire test.

p = Proportion of cases in the “0” group.

q = Proportion of cases in the “1” group.

Most people won’t work this formula by hand as most statistical software packages can calculate the coefficient for you.

Related Questions

How many solutions will the system of equations have? System: y = 2x + 2 and y = x + 4

Answers

y=-2x+2
y=x2-2x+4

is the value of x such that when you plug it into both equations, they both produce the same value of y, or the value of x such that

-2x+2=x2-2x+4

solving this equation----------> x2=-2, taking square root of both sides gives x= ±√2i, or the system has no real solutions but has 2 complex solutions. If you graph both functions in the xy-plane, where x, y are real numbers, you' ll see they do not intersect, which implies there is no real number solutions.

What is the simplest form of the radical expression?
√2+√5/√2-√5

Answers

here u go...........

can sum one help me please

Answers

Answer:

scale facror:

x = 5

Perimeter = 5+4+4+5+6 = 24

What is the greatest common factor of 50, 30, and 46?

Answers

The answer is 2 I believe

What is the slope of the following equation: Y=4x-2

Answers

Answer:

slope is 4 and intercept on y-axis is -2.

A watch I bought
for £1500
increases in value
by 9% a year for n
years.
Work out how
years it would take
to double my
money.

Answers

Answer:

About one year

Step-by-step explanation:

1500*0.9=1350

answer please !!! taking an exam rn

Answers

Answer:

Step-by-step explanation:

Kiran has 2 & 3/4 pounds of flour. When he divides the flour into equal-sized bags, he fills 4 & 1/8 bags. How many pounds fit in each bag?

Answers

Answer:

The number of pounds that will fit in each bag is 2/3 pounds of flour

Step-by-step explanation:

Here, we want to know the amount of pounds that will fit in each bag

What we have to do here is to divide the total number of pounds of flour, by the number of bags filled

We have this as;

2 3/4 divided by 4 1/8

This is;

11/4 divided by 33/8

= 11/4 * 8/33 = 2/3 pounds

What is the value of x in the representation below
3,7,-3,-7

Answers

Answer:

-3

Step-by-step explanation:

Let's rewrite it as an equation

3*x + 2*1 = 7*(-1)

3x + 2 = -7

3x = -9

x = -3

The answer is -3 after going through the equation

Add 5 1/5 and 4 3/5 as a fraction

Answers

Answer:

9 and 4/5

Step-by-step explanation:

need help solving to complete the square

Answers

Answer:

b=9 and b=-21

Step-by-step explanation:

first step: move 195 to the other side by adding to get:

b^2+12b=189

now to find the constant you take the b value which is 12 divide that by 2 and square it. then add the product to both sides. 12/2=6, 6^2=36

b^2+12b+36=189+36

next factor b^2+12b+36.

(b+6)^2=225

square root both sides to get:

b+6=15 and b+6=-15

solve by subracting 6 to both sides and you get the 2 final answers.

b=9 and b=-21

which answer matches the sentence?

9 is 3 less than a number n

1. 9=3-n
2.9=n+3
3. 9=3n
4. 9=n-3

Answers

Answer:

Step-by-step explanation:

'3 less than n' = n-3

'9 is' = 9=

For each diagram, decide if y is an increase or a decrease of x. Then determine the
percentage.
A
у
B
у

Answers

Answer:

A: Decrease, y is 80% of x

B: Increase, y is 160%of x

Step-by-step explanation:

It sounds like it wants to know what percent Y is of X, so if y was 50% of x, that would mean y was half as much of x. so if x was 10 and y was 5

A: x is 5 and y is 4 since y is less it is a decrease. to find the percent do 100*y/x, so in this case that's 100*4/5 =80, so y is 80% of x. and it makes sense it is less than 100% since x is less than y

B: x=5 and y=8 y is greater than x so it is an increase and will be more than 100%. 100*8/5 = 160 so y is 160% of x

Write down the number eleven thousand,eleven hundred and eleven in figures

Answers

Answer:

12,111

Step-by-step explanation:

Please help!!
the function of C gives the percentage of homes using only cell phone service X years after 2004 explain the meaning of each statement.

1. C(10)=35
2. C(x) = 10
3. how is C(10) different from C(x) = 10?

Answers

Answer:

Step-by-step explanation:

1. C(10)=35 is the percentage of homes using only cell phone service 10 years after 2004, that is, after 2014.

2. C(x) = 10 is the percentage of homes using only cell phone service x years after 2004. We must find x.

3. how is C(10) different from C(x) = 10?

In C(10), 10 measures time in years and is the independent variable here; C10) is the dependent variable. See (2), above. In C(x), x is the (unknown) independent variable, whereas 10 is the output vaue, the dependent variable.

I need help ASAP... I need help ASAP I need help ASAP I need help ASAP I need help ASAP I need help ASAP I need help ASAP I need help ASAP I need help ASAP...

Answers

Answer:

A & B

Step-by-step explanation:

Hope this helpsss

Answer:

A and B.

Step-by-step explanation:

I took this test

Can somebody help me with this. Will Mark brainliest.

Answers

Answer:

The answer is 36 I believe

Step-by-step explanation:

Answer:

Step-by-step explanation:

sin(x) = 5.9/8.1

x = arcsin(5.9/8.1) ≅ 47°

3+3 what is it i need help please

Answers

6 fooo take this down

PLEASE HELP! I WILL MARK AS BRAINLYEST

Answers

6 is the answer I think

Remy is on the Track Team. She spends 45 minutes running during each practice.

How many minutes will she run in 10 days?

Answers

Answer:

450 minutes

Step-by-step explanation:

Answer:

Wouldn't you multiply 45 × 10?

Step-by-step explanation:

Because it's 45 minutes each day she practices.

Help!!!!!!fast!!!!noww!!!!!help!!!!

Answers

Answer:

q^12

Step-by-step explanation:

To solve, multiply the exponents

please help me 8th grade math i’ll give brainliest fastest answer also show work

Answers

Answer: It's a B answer.

Show your work here:

In an ordered pair the first coordinate is x the coordinate, and the second coordinate corresponds to the y coordinate.

Then we must substitute the given value of x in the equation and verify that we get in return the defined value for y.

the options are (-2,4)

in this one x=-2, and y=4, so let's confirm:

y=-3x-4

y=-3(-2)-4

y=-6-4

y=2

this is not a solution since the y values are not the same.

in this one x=-3 and y=5, let's also confirm:

y=-3(-3)-4

y=9-4

y=5

in this one the values for y are equal, this is a solution for the equation.

so give me a brainlest!

A storé is offering a 20% discount on all items. Write an equation for the relationship between the discount price of an item, d, and its original price, p.

HELP THANK S

Answers

Answer:

There are many ways you can write this as an equation:

[tex]d=p-20 %[/tex]%

[tex]d=.8p[/tex]

[tex]d=p-.2p[/tex]

a. 17 + 4p
b. 18 + 3d + 3p
c. 18 + 4p
d. 17 + 3d + 3p

Answers

the answer is 17+4p . A

Answer:

c. 4p+18

Step-by-step explanation:

-7d + 2d + 3d + 2d = 0

6p-3p+p = 4p

7-11+14+8 = 18

4p+18

Pls help I’m in a call by myself with my math teacher

Answers

i’m pretty sure it’s 70 m i think

plz answer this ones

Answers

Answer:

Step-by-step explanation:

it's 44 because median is alwys in between and simply look at the scale

In circle D with m \angle CDE= 60m∠CDE=60 and CD=3CD=3 units, find the length of arc CE. Round to the nearest hundredth

Answers

Answer:

Length of arc CE = 3.14 unit (Approx.)

Step-by-step explanation:

Given:

Radius of circle = 3 units

Angle between radius = 60°

Find:

Length of arc CE

Computation:

Length of arc = [θ/360][2πr]

Length of arc CE = [60/360][2(2/7)(3)]

Length of arc CE = [60/360][2(3.14)(3)]

Length of arc CE = [1/6][6(3.14)]

Length of arc CE = 3.14 unit (Approx.)

Answer:

15.08

Step-by-step explanation:

360/48 (2π18)

Help Please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!111

Answers

Answer:8 cups

Step-by-step explanation:

Can someone help me on this plzzz???

Answers

Answer:

subtract to elimanate x.

Step-by-step explanation:

Brainliest pls??

Please help its due in a hour

Answers

The side lengths of a triangle are 5,8 and 12 is this a right triangle?
A. no, because 5 + 8 ≠ 12.
B. yes, because 5² + 8² = 12².
C. no, because 5²+ 8² ≠ 12².
D. yes, because 5² + 8² < 12²
Step-by-step explanation:
Pythagoras theorem states c^2=a^2 + b^2
5^2=25
8^2=64
25+64=89

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