February 13
February 13
February 13
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MORE DETAIL of PANIC<br />
P μ = the mean of the population<br />
ρ = the population proportion<br />
make this description very specific to the problem<br />
A assumptions (3 to check)<br />
1) SRS must be stated in the problem<br />
2) check for "normality"<br />
a) this can be stated in the problem<br />
b)<br />
**<br />
* Sample size < 15.<br />
NO OUTLIERS, NORMAL POPULATION<br />
* Sample size ≥ 15.<br />
NO OUTLIERS, NO STRONG SKEW<br />
* Large sample size (n > 30)<br />
NO OUTLIERS<br />
if n(p) ≥ 10 and n(p1)≥10<br />
∧<br />
then thumb 2 passes for ρ,p world<br />
c) plot a histogram or boxplot and eyeball<br />
the graph for "normality"<br />
3) 10(n) ≤ total population<br />
(Independence and thumb 1)<br />
(no better method available)<br />
N name the test<br />
t confidence interval for a population mean<br />
with _____ degrees of freedom<br />
I Interval (do the math)<br />
C conclusion<br />
I am ____% confident that the true (mean or<br />
proportion) of the ________ population is<br />
captured by the interval ( , ) units.<br />
make this description very specific to the problem<br />
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