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3 years ago

I need help. 18 = a/2

Mathematics

2 answers:

andrezito [222]3 years ago

7 0

X is 36 hope this help

stiks02 [169]3 years ago

3 0

$a = 36$ ✔

Step-by-step explanation:

$18 = \frac{a}{2} \\ ➡ \: a \: = 18 \times 2 \\ ➡ \: a = 36$

$\bold{ \green{ \star{ \orange{Hope\:it\:helps.}}}}⋆$

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Answer:

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Step-by-step explanation:

Data provided in the question:

For sample 1:

n₁ = 10

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For sample 2:

n₂ = 15

variance, s₂² = 30

Now,

The pooled variance is calculated using the formula,

$S^{2}_{p} = \frac{(n_{1}-1)\times s^{2}_{1} +(n_{2}-1)\times s^{2}_{2}}{n_{1}+n_{2}-2}$

on substituting the given respective values, we get

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Hence,

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Therefore,

The correct answer is option (a) It will be closer to 30 than to 20

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Answer:

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Step-by-step explanation:

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Answer:

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