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3 years ago

If the standard deviation for a set of data is 0, which of the following must be true?

Mathematics

1 answer:

luda_lava [24]3 years ago

7 0

Answer:

C. All of the data values are identical.

Step-by-step explanation:

If the standard deviation for a set of data is 0, then all of the data values are identical.

When a standard deviation is 0, then the variance is also 0 and the mean of the deviation that is squared is also 0, thereby making all the values identical to the mean, that is 0.

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Eddi Din [679]

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4 years ago

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8 times the difference between a number and 6 is equal to 4 times the number...

astraxan [27]

Answer:

(A) 12

Step-by-step explanation:

First, lets define the number as x.

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3 years ago

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If RS = 3x + 1, ST = 2x – 2, and RT = 64, find the value of x.

Mrac [35]

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3 years ago

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seropon [69]

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Step-by-step explanation:

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3 years ago

A sample is selected from a population with μ = 46, and a treatment is administered to the sample. After treatment, the sample m

Georgia [21]

Answer:

0.5

Step-by-step explanation:

Solution:-

- The sample mean before treatment, μ1 = 46

- The sample mean after treatment, μ2 = 48

- The sample standard deviation σ = √16 = 4

- For the independent samples T-test, Cohen's d is determined by calculating the mean difference between your two groups, and then dividing the result by the pooled standard deviation.

Cohen's d = $\frac{u2 - u1}{sd_p_o_o_l_e_d}$

- Where, the pooled standard deviation (sd_pooled) is calculated using the formula:

$sd_p_o_o_l_e_d =\sqrt{\frac{SD_1^2 +SD_2^2}{2} }$

- Assuming that population standard deviation and sample standard deviation are same:

SD_1 = SD_2 = σ = 4

- Then,

$sd_p_o_o_l_e_d =\sqrt{\frac{4^2 +4^2}{2} } = 4$

- The cohen's d can now be evaliated:

Cohen's d = $\frac{48 - 46}{4} = 0.5$

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3 years ago

If the standard deviation for a set of data is​ 0, which of the following must be​ true?

If the standard deviation for a set of data is 0, which of the following must be true?