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Standard deviation represents

We take a sample because

project_4_day_2

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Questions 9

Answers

1
We take a sample because
All 3 other answers
it's computationally too expensive to use the whole population
it's normally impossible to survey the entire population
the population size is so big that the data cannot be properly explored
2
Standard deviation represents
a measure of central tendency
None of these 3, Ben you're always trying to trick us
how spread out the data is
the degrees of freedom across multiple features
3
The statistics you and the theory you learn this week are only relevant to A/B testing?
True
False
4
If our study has bias
we should remove it like duplicate rows
none of these 3 Ben, that's just silly and this is a trick
the person who collected the data must be fired
so long as less than 0.05% of our data is biased it's not a problem
5
P-value is always 0.05
True
False
6
We perform an experiment to
get other people to do our work for us
look important
see how much money we can make
support or refute a hypothesis
7
A/B testing physical features of a phone, such as different styles of volume buttons, is a good idea?
False
True
8
The sample mean is often represented by Γ (gamma)
True
False
9
Probability is expressed as a value between 0 and 1
True
False