All categories

2 years ago

What is a chi-squared test?

Mathematics

1 answer:

Step2247 [10]2 years ago

4 0

Answer:

A chi-squared test, also written as χ² test, is a statistical hypothesis test that is valid to perform when the test statistic is chi-squared distributed under the null hypothesis, specifically Pearson's chi-squared test and variants thereof.

I hope it's helpful!

You might be interested in

What is the value of x in the equation Three-fifths x = negative 45?

ryzh [129]

Answer:

x = -75

Step-by-step explanation:

$\frac{3}{5} x=-45\\\\3x=-225\\x=-75$

3 0

2 years ago

Piper used 1/5 meter of ribbon to create a border around a triangle if each side of the triangle is the same length how much rib

olasank [31]

Answer:

$\frac{1}{15}$

Step-by-step explanation:

as said in the question that the triangle has three equal sides. i.e. this is an equilateral triangle. So,

let us consider one side of the triangle to be x . and 3x( x+x+x) should be equal to 1/5

$x+x+x = \frac{1}{5}\\3x=\frac{1}{5}\\x = \frac{1}{5} / 3\\x = \frac{1}{5} * \frac{1}{3}\\x = \frac{1}{15}$

6 0

2 years ago

I need help again i will mark brainliest

kykrilka [37]

1.false
2. true
3.true
4.false

Hope this helps!

5 0

2 years ago

Graph the function <br> Is it a, b, c or d?

Jobisdone [24]

Answer:

Step-by-step explanation:

(the line is a / shape, so the slope is positive)

(the line crosses the y axis at (0,-2))

(using the above information, we can conclude that the equation is y=2x-2)

slope = m = rise/run = 2/1 = 2

y=mx+b

y=2x+b

Choose any point on the line) (1,0)

0=2(1)+b

b=-2

y=2x-2

6 0

2 years ago

What is the average rate of change for the function f(x)=3x^2 -5 on the interval −3 ≤ x ≤ −1 ?

Anestetic [448]

Answer:

-12

Step-by-step explanation:

Let b = -1 and a = -3

The average rate of change = $\frac{f(b) - f(a)}{b - a}$

f(b) = f(-1) = 3(-1)^2 - 5 = 3 - 5 = -2

f(a) = f(-3) = 3(-3)^2 - 5 =27 - 5 = 22

f(b) - f(a) = -2 - 22 = -24

b - a = -1 + 3 = 2

$\frac{f(b) - f(a)}{b - a}$ = -24/2 = -12

4 0

2 years ago