Regarding statistical tests
(a)
the middle observation in an ordered series is the median
(b)
the mean is the most frequently occurring observation in a series
(c)
the standard deviation gives an indication of the scatter of the observations
(d)
95% of all values lie within ±2 SD
(e)
the standard deviation is a measure of the significance of observations
(a) true (b)
false (c)
true (d)
true (e)
false
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