The Number that is in the middle.
If there is an even number add the two middle # then divide by two
question
Sample variance
answer
Xi=
The sample variance is found by squaring the sample standard deviation.
question
Find the mode:
answer
The middle
question
m(mew)
answer
The population
arithmetic mean), is computed using all the individuals in a
population. The population mean is a parameter.
question
x?
answer
The sample arithmetic mean, x (pronounced "xbar"), is computed using
sample data. The sample mean is a statistic.
question
Frequency distribution
answer
1stAdd the first two numbers and divide by 2
2nd Input into calculator to find the
separate by two list
3rdMake sure to enter L1,L2 to find the information
question
Standard deviation for sample
answer
s orsx
question
Standard deviation( to look for on calculator)
answer

question
Histogram skewed right
pg132
answer
Mean>Median
Mean is larger than median
question
Histogram skewed left
answer
Mean
question
Histogram symmetric
answer
Mean=Median
Empirical rule
Equal
question
Histogram depicts data witha higher standard deviation?Why?
answer
Histogram B depicts the higher standard deviation,because the distribution has more dispersion.
question
Mean
answer
The Average
question
Mode
answer
The most
question
Standard deviation
answer
Why do we square before summing them?
Squaring makes each term positive, so that the mean does not cancel values
What would happend if we didnt?
question
Chebychev's Theorem
answer
1st Find the percentage using the formula
2ndUse the formula ? Â± k?
question
Empirical rule how to:
answer
1stMake sure it is bell shaped
2nd Figure out which percentage=?
3nd ? Â± ??
(MeanÂ±?(standard deviation)
question
Empirical Rule match :
Standard deviation 1
Standard deviation 2
Standard deviation 3
answer
Standard deviation 168Split on both sides
Standard deviation 295Split on both sides
Standard deviation 399.7Split on both sides
(MeanÂ±#(standard deviation)
question
What do we mean when we say tha the median is more resistant to extreme values than the mean.Give an example of this.
answer
Very large or small data do not affect its value substantially.
Page132
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