Central Limit Theorem

Confidence Interval

Constructs

• Instruction - Definition of “constructs”
• Quiz - Which are constructs?
• Quiz - Match constructs with operational definitions

Critical values of z

• Quiz - Critical values for 95% confidence
• Quiz - Critical values for 98% confidence
• Instruction - Definition of “critical values of z”

Decision errors

• Quiz - Probability of Type I error (Coming soon!)

Distribution

Frequency

• Quiz - Tally the frequency

Histogram

Interval estimate (see “Confidence Interval”)

Lurking variables

• Solution - Lurking variables are extraneous factors

Margin of error

Mean

Measures of Center

• Solution - Mean, median, and mode
• Quiz - Measures of center for skewed distribution
• Quiz - Measures of center for normal distribution
• Quiz - Summarize measures of center

Median

• Quiz - Find the median
• Quiz - Find median using spreadsheet

Mode

• Quiz - Mode of data values
• Quiz - Mode of distribution

Normal Distribution

Operational definition

• Instruction - Definition of “operational definition”
• Quiz - Match constructs with operational definitions

Outlier

• Quiz - Formal definition of “outlier”

Percentile

Point estimate

• Solution - Best guess for new population mean
• Solution - Generalize point estimate

Probability

• Quiz - Probability less
• Quiz - Probability less
• Quiz - Probability more
• Quiz - Probability between

Random

• Instruction - Definition of “randomness”
• Quiz - Which are random samples?

Relative frequency

• Quiz - Calculate relative frequencies

Sampling distribution

• Quiz - Definition, shape of sampling distribution
• Instruction - Standard deviation of sampling distribution
• Quiz - Mean of sampling distribution
• Solution - Standard deviation of sampling distribution

Standard deviation

• Instruction - What is standard deviation, how to find it
• Quiz - Calculate standard deviation
• Quiz - Calculate standard deviation with spreadsheet
• Quiz - Sample standard deviation

Standard error

• Quiz - What is standard error?

Sum of Squares

• Quiz - Formula for sum of squares

Type I Error (see “Decision errors”)
Type II Error (see “Decision errors”)

Variance

• Solution - Definition of “variance”

Z-scores

• Instruction - Z is the number of standard deviations
• Solution - Standard Normal distribution
• Quiz - Z-scores of sample means

Z-table