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3 years ago

Pleeaaaase hellllpppp asap

Mathematics

2 answers:

muminat3 years ago

7 0

Answer:

Option B

Step-by-step explanation:

the mean is the sum of each value of P(x) multiply for x

Mean= 23x0.16 + 25x0.09 + (26x0.18) + (31x0.12)+ (34x0.24) + (38x0.21)

Mean= 30.47

Anna [14]3 years ago

6 0

Answer:

B. 30.47

Step-by-step explanation:

The mean discrete random variable tells us the weighted average of the possible values given of a random variable. It shows the expected average outcome of observations. It's like getting the weighted mean. The expected value of X can be computed using the formula:

$\mu_{x}=x_1p_1+x_2p_2+x_3p_3...+x_kp_k\\\\=\Sigma x_ip_i$

Using the data given in your problem, just pair up the x and P(x) accordingly and get the sum.

$\mu_{x}=x_1p_1+x_2p_2+x_3p_3+x_4p_4+x_5p_5+x_6p_6\\\\\mu_{x}=(23\times 0.16) + (25\times 0.09) + (26\times 0.18) + (31\times 0.12) + (34\times 0.24) + (38\times 0.21)\\\\\mu_{x} = 30.47$

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kotykmax [81]

Answer:

∠C = 80 ° ; ∠ T = 40°.

Step-by-step explanation:

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3 years ago

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4vir4ik [10]

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vovangra [49]

Answer:

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Step-by-step explanation:

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Shalnov [3]

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To find the confidence interval, we use:
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$11.3 \pm 1.645*(\frac{16.6}{\sqrt{1002}})
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3 years ago

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ohaa [14]

Did it step by step , hope it helps !

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