tseaux9

21.11.2019 • 

Mathematics

Since we simulated this dataset, we know the true population standard deviation for the individual observations. here σ = 3 and you computed the theoretical standard deviation for the sample mean, σ ¯ x = σ √ n . assuming the population standard deviation is known, the confidence interval uses a z, i.e.,it is ¯ x ± e where e = z α 2 × σ √ n . recall that z α 2 is the z-score corresponding to the α 2 = 0.05 2 = 0.025 quantile on the standard normal distribution. question 6: for a 95% confidence interval, what is the margin of error e? round to three decimal places. e =

Ответ:

kimjooin02

17.05.2020

Mathematics

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Step-by-step explanation:

Given in the question,

C(8,2)

Formula to use:

nCr = n! / r! * (n - r)!

here n = 8

r = 2

We have to calculate combinations of 8 object taken 2 at a time, then

C(8,2)

8C2

8! / 2! * (8 - 2)!

56/2

28

So, 8C2 = 28

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