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2 years ago

Which of the following is NOT a property of the chi-square distribution?

Mathematics

1 answer:

LenKa [72]2 years ago

5 0

Answer:

A) The mean of the chi-square distribution is 0

A) is not a property of chi square distribution.

Step-by-step explanation:

We have to find the properties of a chi square test.

A) False

The mean of a chi square distribution is equal to the degree of freedom.

B) True

The chi-square distribution is non symmetric.

C) True

The chi square value can be zero and positive.

It can never be negative because it is based on a sum of squared differences .

D) True

The chi-square distribution is different for each number of degrees of freedom.

When we are working with a single population variance, the degree of freedom is n - 1.

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butter and flour are mixed in the ratio 2:3. paul has 640 grams of butter and 880 grams of flour. how much more flour does he ne

madam [21]

Answer:

80g

Step-by-step explanation:

Here's why:

SO you have 2:3 ratio which means the ratio for grams of butter/grams of flour has to be 2:3.

So we set up the following equation:

2/3 = 640/x (solve for x)

x= 960g

960g is what you should have to get to ratio, but the question is asking how much more you need from the initial given flour.

So you need (suppose x is the grams of flour you need)

x+880g = 960g (solve for x)

x=80g

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2 years ago

aubrey uses the following formula to calculate a required value. which elementd of the formula use mixed cell referencing

pickupchik [31]

Answer:

$1A

Step-by-step explanation:

The elements of a formula only can have the following format:

1) Letter Number as C1

2) Letter $ Number as A$1

3) $ Letter Number as $A1

4) $ Letter $ Number as $A$1

The element $1A is not in the format

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2 years ago

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The weight of a USB flash drive is 30 grams and is normally distributed. Periodically, quality control inspectors at Dallas Flas

vazorg [7]

Answer:

The critical t values are -1.746 and 1.746.

Step-by-step explanation:

Given information:

The weight of a USB flash drive is 30 grams and is normally distributed.

Population mean = 30

Sample size = 17

Sample mean= 31.9

Standard deviation = 1.8

Significance level, α=0.10

Null hypothesis: $H_0:\mu=30$

Alternative hypothesis: $H_1:\mu\neq 30$

It is a two tailed test.

The t-critical values for a two-tailed test, for a significance level of α=0.1 are -1.746 and 1.746.

Therefore the critical t values are -1.746 and 1.746.

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2 years ago

Solve the equation by completing the square. Round to the nearest hundredth if necessary. x2 – 4x = 5

Ksenya-84 [330]

Solve for x over the real numbers:
x^2 - 4 x = 5

Subtract 5 from both sides:
x^2 - 4 x - 5 = 0

x = (4 ± sqrt((-4)^2 - 4 (-5)))/2 = (4 ± sqrt(16 + 20))/2 = (4 ± sqrt(36))/2:
x = (4 + sqrt(36))/2 or x = (4 - sqrt(36))/2

sqrt(36) = sqrt(4×9) = sqrt(2^2×3^2) = 2×3 = 6:
x = (4 + 6)/2 or x = (4 - 6)/2

(4 + 6)/2 = 10/2 = 5:
x = 5 or x = (4 - 6)/2

(4 - 6)/2 = -2/2 = -1:

Answer: x = 5 or x = -1

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2 years ago

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All of the following are equivalent except _____. A:5 over 4. B:1.25. C:12.5%. D:125%.

earnstyle [38]

Hello, there!

5/4 = 1.25

So, we know that the answer is not A or B.

1.25 = 125%

Now, we know that the answer is not D ether.

So, the answer must be C.

I hope I helped!

Let me know if you need anything else!

~ Zoe

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2 years ago

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Which of the following is NOT a property of the​ chi-square distribution?

Which of the following is NOT a property of the chi-square distribution?