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Sticky Note
The variance of a standard normal variable is?
  1. 1
  2. 0
  3. 0.5
  4. None of these
Explanation

A standard normal distribution has:

Mean = 0

Standard deviation = 1

So, Variance = (Standard deviation)² = 1² = 1

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An ______ is a subset of a sample space.
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A password contains 1 integer, 1 letter, and 1 symbol. If there are 5 integers, 3 letters, and 2 symbols, how many passwords are possible?
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  2. 180
  3. 190
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  2. 1/3
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