lec 2 Flashcards
what are peramiters?
values used to describe populations
values used to describe samples are known as what?
statistics
statistics have what to denote them?
roman symbols
Y is an unbiased estimate of what?
U or mu
what is sampling distribution?
the probability distribution of all values in an estimate that we may have obtained when sampling a population
visualize a sample distribution process.
click this link, https://whitlockschluter3e.zoology.ubc.ca/index.html and then follow the hub for the sample distribution visualization module.
what is the central limit theorm?
as the sample sizes become large sample distribution begins to mimic normal distribution
what information can sampling distribution provide in a scientific context.
the certanty around an estimate
the standard error of an estimate is what?
the standard deviation of the standards sampling distribution
the two factors that govern standard error are what?
how the population varies and sample size.
what are confidence intervals?
a range of values around the sample estimate that is likely to contain the population perameter
if the confidence interval is high….
if the confidence interval is low…
uncertainty is high
we can be more confident our answer is close.
what is the common confidence interval reported in a successful data analyzation?
95%
what type of graph should never be used in any kind of significant circumstance?
a dynamite plot
