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3 years ago

Yo i neeeeeeeeeeeeeeeeeeeeeeeeeeeed urgent elp

Mathematics

2 answers:

nignag [31]3 years ago

8 0

Answer:

wheres ur calc

Step-by-step explanation:

9.25 - 0.5 + 0.375 = 9.126

nordsb [41]3 years ago

8 0

The awnser is above me but it would be better if you used your calculator

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Answer:

$\bar x = 82$

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Step-by-step explanation:

Given

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Solving (a); Point estimate of mean

To do this, we simply calculate the sample mean

$\bar x = \frac{\sum x}{n}$

$\bar x = \frac{87+ 91+ 86+ 82+72+91+60+77+80+79+83+96}{12}$

$\bar x = \frac{984}{12}$

$\bar x = 82$

Solving (b); Point estimate of standard deviation

To do this, we simply calculate the sample standard deviation

$\sigma = \sqrt{\frac{\sum(x-\bar x)^2}{n - 1}$

$\sigma = \sqrt\frac{(87-82)^2+ (91-82)^2+ ....+ (79-82)^2+ (83-82)^2+ (96-82)^2}{12-1}$

$\sigma = \sqrt\frac{1022}{11}$

$\sigma = \sqrt{92.91}$

$\sigma = 9.64$

<em>Note that: The sample mean and the sample standard deviation are the best point estimators for the mean and the standard deviation, respectively.</em>

<em>Hence, the need to solve for sample mean and sample standard deviation</em>

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IRISSAK [1]

Answer:

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Step-by-step explanation:

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Answer:

I think it might be data and range

Step-by-step explanation:

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