# Test and CI assumptions

## 9 terms

### Single Proportion

1. SRS (or random), 2. Population 10x sample, 3. np and n(1-p) are at least 10

### Single Mean (known σ)

1.SRS (or random), 2. normal population of sample size above 30

### Single Mean (unknown σ)

1. SRS (or random), 2. one of the following: a. normal population, b. sample size at least 40, c. sample size at least 15 and no outliers or strong skewness, d. sample size less than 15 and close to normal.

### Matched Pairs

1. SRS (or random), 2. one of the following: a. normal population, b. sample size at least 40, c. sample size at least 15 and no outliers or strong skewness, d. sample size less than 15 and close to normal.

### Chi-Squared Test

1. All data counts, 2. All expected counts are at least 1, 3. No more than 20% of the expected counts are less than 5

### Compare Two Proportions

1. Independent SRS (or independent random samples), 2. Populations 10x sample 3. np and n(1-p) are at least 5

### Compare Two Means (known σ)

1. Independent SRS (or independent random samples), 2. Both populations are normally distributed or sample sizes at least 30

### Compare Two Means (unknown σ)

1. Independent SRS (or independent random samples), 2. one of the following: a. normal population, b. sample size at least 40, c. sample size at least 15 and no outliers or strong skewness, d. sample size less than 15 and close to normal.

### Inference for the Regression Slope

1. SRS (or random sample), 2. Response varies normally around true regression line, 3. True relationship is linear, 4. Standard deviation of the response about the true line is the same everywhere.