3 years ago

What does the symbol ∈ mean

Mathematics

1 answer:

Kazeer [188]3 years ago

8 0

It mean the Element of so x(that symbol) A means x is an element of the set A

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What is the probability that the mean duration of the 24 rowers with idna exceeds 63 minutes?

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Answer:

Step-by-step explanation:

Given that: Training-session duration of female rowers with normal iron status is Normally distributed, with mean 69 minutes and standard deviation 18minutes.

Solution:

z score shows the relationship between sample means. The z score is used to determine by how many standard deviations the raw score is above or below the mean. It is given by the formula:

$z=\frac{x-\mu}{\sigma}\\\\for\ sample(n):\\\\z=\frac{x-\mu}{\sigma/\sqrt{n} } \\\\where\ \mu=mean,\sigma=standard\ deviation,x=raw\ score$

Given that μ = 69 minutes, σ = 18 minutes, n = 24

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