Populations, sample and ND Flashcards
the five number summary inludes
Range (min, max)) , upper and lower Quatrile, median
A normal distribution is a symmetric population
True
population spread is measured by
Standard deviation
Normal distribution peak is at
population mean
if data is not normal location and spread measure by
Median and IQR
SE decreases as sample size increases
true
top and bottom lines of whisker plots are
upper and lower quatriles
line drawn in middle in a whisker plot is
median
whiskers in box plot
maximum and minimum (range)
width of a normal population is determined by
SD
central limit theorem
as sample size increases the sample mean approaches ND
in a skewed data the mean depends on the skew
true
positive and negative skew
right and left word contain mean median and mode respectively
if the width increases the confidence interval increases
true
the range of the means of different sample sizes in a population is
CI
