Inference

Front 1

One Sample Proportion

Back 1

1. Independence - SRS, n<10% of population
2. Large Sample - np>10, n(1-p)>10

Front 2

Proportion for Two Groups

Back 2

1. Groups are independent - think about set up
2. Data is independent - SRS, n<10% of population
3. Large Sample - np>10, n(1-p)>10

Front 3

One Sample Mean

Back 3

df = n-1
1. Independence - SRS, n<10% of population
2. Population has a normal model - Histogram

Front 4

Matched Pairs - Means

Back 4

df=n-1
1. Data are matched - are they?
2. Independence - SRS, n<10% of population
3. Population of differences is normal - Histogram

Front 5

Means Two Independent Groups

Back 5

df from calculator
1. Groups are independent - design
2. Data is independent - SRS, n<10% of population OR random allocation
3. Populations are normal - Histogram

Front 6

Goodness of Fit

Back 6

df=# of cells - 1
1. Data are counts - are they?
2. Data are independent - SRS, n<10% of population
2. Large Sample - all expected counts >= 5

Front 7

Homogeneity

Back 7

df=(r-1)(c-1)
1. Data are counts - are they?
2. SRS, n<10% of population OR random allocation
3. Large Sample - all expected counts >= 5

Front 8

Regression

Back 8

df=n-2
1. Relationship is linear - scatterplot
2. Errors are independent - no pattern in residual
3. Variability in errors is constant - residual has consistent spread
4. Errors have a normal model - normal probability plot is linear