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Ideas in statistics I Flashcards | StudBud
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Ideas in statistics I
Ideas in statistics I
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Questions
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Answers
1
The empirical rule is based on the normal distribution?
True
False
2
A probability of .05 is the same as 50 %
true
false
3
Total percentage under a normal distribution is 100
false
true
4
A quantitative variable can be discrete or continuous?
True
False
5
x bar is the best statistical estimate of the population mean?
false
true
6
An important idea in statistics is that samples can be used to predict information about the population.
false
true
7
How large is a population?
no exact number
over 100
1 million or more
over 10,000
8
What is a sample in statistics ?
Any group of information one collects
A selected portion from a population
Same as the popualtion
something you receive free in the mail
9
What is the name for the sample mean?
x bar
greek letter u
s
sigma
10
What is true about a z value or s score?
can never be negative
symbol is s
same as sigma
It represents the number of standard deviation units from the mean
11
What is the population mean?
u
sigma
x bar
s
