1. Delta Distribution
Relative Frequency 10 20 30 40 50
Catch of Fish

2. “True” but unknown
distribution
Relative Frequency
Data – 1.1, 2.2, 1.4, 3.6, 0.8, 2.5,……
Frequency
Observed frequency
Distribution approximates
true unknown
distribution

3. Start with data – 1.1, 2.2, 1.4, 3.6, 0.8, 2.5, 3.6
Put data into an array
Item
Item
Item
Item
Item
Item
Take a bootstrap sample by selecting 6 items from
Above list (with replacement)
Item
Item
Item
Item
Item
Repeat until you are sick of it! (e.g., 10,000 times)

4. Observed mean= Var=
95% CI = mean +/- ( t *s/sqrt(n))
/ or to 50.03
Bootstrap 95% CI: to (width=3.41)