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kadariusmerchan

kadariusmerchan

27.07.2020 •

Mathematics

Tje mean of 12 scores is 8.8 what is the sum of tue 12 scores

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Ответ:

letdou2670

30.01.2022

105.6

Step-by-step explanation:

If the mean is 8.8, than that means that in total the sum must be (8.8 * 12) which equals 105.6.

This is because the sum of all the numbers in a list divided by the amount of numbers in a list equals the mean.

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Ответ:

esanchez2002fcb

27.05.2022

p-value = 0.9953

Step-by-step explanation:

Given

$P = 40\%$ --- proportion of population

n = 200 -- samples

$p = 31\%$ -- proportion of samples

Required

Determine the p value

First, calculate the standard deviation ( $\sigma$ )

$\sigma = \sqrt{\frac{P*(1 - P)}{n}}$

$\sigma = \sqrt{\frac{40\%*(1 - 40\%)}{200}}$

$\sigma = \sqrt{\frac{0.40*(1 - 0.40)}{200}}$

$\sigma = \sqrt{\frac{0.40*0.60}{200}}$

$\sigma = \sqrt{\frac{0.24}{200}}$

$\sigma = \sqrt{0.0012}$

$\sigma = 0.0346$

Next, we calculate the z score

$z = \frac{p - P}{\sigma}$

$z = \frac{40\% - 31\%}{0.0346}$

$z = \frac{9\%}{0.0346}$

$z = \frac{0.09}{0.0346}$

z = 2.6012

$z \approx 2.60$

From the z table, the p value of z = 2.60 is: 0.9953

Hence:

p-value = 0.9953

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