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siniylev [52]
3 years ago
14

An SRS of size 20 is drawn from a population that has a normal distribution. The sample has a mean of 122.5 and a standard devia

tion of 8. Give the standard error of the mean:______
Mathematics
1 answer:
Tems11 [23]3 years ago
8 0

Answer:

The value is  \sigma_{\= x} = 1.789

Step-by-step explanation:

From the question we are told that

   The sample size is  n =  20  

    The sample mean is \= x = 122.5

    The standard deviation is  s =  8

Generally the standard error of the mean is mathematically represented as

       \sigma_{\= x} =  \frac{s}{\sqrt{n} }

=>    \sigma_{\= x} =  \frac{8}{\sqrt{20 } }

=>    \sigma_{\= x} = 1.789

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13:6 ; 9:4 ; 5:2 ; 20:7 ; 10:3

Step-by-step explanation:

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Electric utility poles in the form of right cylinders are made out of wood that costs $25.46 per cubic foot. Calculate the cost
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Answer:

$ 1349.746624

Step-by-step explanation:

The volume of a cylinder

The formula for calculating the volume of a cylinder is expressed as:

V=πr²h

where:

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Given the following parameters

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2 years ago
Math To Do in Ready
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C=100.5 inches

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3 0
3 years ago
A school director must randomly select 6 teachers to part in a training session. There are 34 teachers at school. In how many di
prohojiy [21]

Answer:

Total possible ways to select 6 teachers from 34 teacher are ^{34}C_6=1344904.

Step-by-step explanation:

It is given that total number of teachers at a school is 34.

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^nC_r=\frac{n!}{r!(n-r)!}

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Therefore total possible ways to select 6 teachers from 34 teacher are ^{34}C_6=1344904.

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