SAM Exam Review

Type 1 Error

Rejecting the Null Hypothesis when it was true

When is a poisson distribution used?

When the number of trials is large and the chance of success is small

Type 1 Error

Rejecting the Null Hypothesis when it was true

When is a poisson distribution used?

When the number of trials is large and the chance of success is small

Type II Error

Failing to reject the null hypothesis when it was false

Non-Constant Error Variance

Non-Independent Errors

Non-Linear Residual Plot

Not Normally Distributed

Coefficient of Determination r^2

The proportion of y variability accounted/explained by x

Correlation Coefficient r

Linear correlation between x and y, direction of the relationship between two variables

Central Limit Theorem

As the number of random variables being averaged increases the distribution of the average will approach a normal distribution. As Sample size increases the standard deviation decreases

Vertical Bar chart of frequencies

Histogram

Line Graph of Frequencies

Frequency Polygon

Line graph of cumulative frequencies

Ogive

Bar & Line with bars in descending order and line showing cumulative total for each category

Pareto Chart