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3 years ago

11

please help me ive been doing this ixl since six and its ten o clock and I have school tomorrow. My parents wont let me eat or s

hower or go to bed until this is done

2 answers:

LenaWriter [7]3 years ago

4 0

The 3rd line has rational numbers

Lisa [10]3 years ago

3 0

Answer:

tdhgdfuufddddfjiutdddffffffyuuufdd

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xP(x)00.2510.0520.1530.55Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal pl

Nookie1986 [14]

The Solution:

Given:

Required:

Find the standard deviation of the probability distribution.

Step 1:

Find the expected value of the probability distribution.

$E(x)=\mu=\sum_{i\mathop{=}0}^3x_iP_(x_i)$ $\begin{gathered} \mu=(0\times0.25)+(1\times0.05)+(2\times0.15)+(3\times0.55) \\ \\ \mu=0+0.05+0.30+1.65=2.0 \end{gathered}$

Step 2:

Find the standard deviation.

$Standard\text{ Deviation}=\sqrt{\sum_{i\mathop{=}0}^3(x_i-\mu)^2P_(x_i)}$ $=(0-2)^2(0.25)+(1-2)^2(0.05)+(2-2)^2(0.15)+(3-2)^2(0.55)$ $=4(0.25)+1(0.05)+0(0.15)+1(0.55)$ $=1+0.05+0+0.55=1.60$

Thus, the standard deviation is 1.60

Answer:

1.60

8 0

2 years ago

what is the mean round to the nearest tenth if needed value 1 2 3 4 5 frequency 7 1 3 2 2 please help?

Blizzard [7]

1 * 7 + 2 * 1 + 3 * 3 + 4 * 2 + 5 * 2 =

7 + 2 + 9 + 8 + 10 =

36

Now we need to divide 36 by the total frequency: 7+1+3+2+2=15

36 / 15 = 2.4

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4 years ago

PLEASE HELP I’m bad at math

sleet_krkn [62]

Answer:

6

Step-by-step explanation:

The GCF of 42 and 12 is 6

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3 years ago

Hidden cost of being a teacher?

Natali5045456 [20]

Answer:

they have to pay for school supplies

Step-by-step explanation:

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3 years ago

Mast 1 broadcasts radio signals that can be heard within a radius of 15 km.

Alex73 [517]

Answer:

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Step-by-step explanation:

do your self it is easy

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3 years ago