# ST095 Course Index

Alternative Hypothesis (see "Hypotheses")

ANOVA

• Quiz - Understanding the F-ratio
• Quiz - Between-group and within-group variability
• Quiz - Calculate F-statistic
• Solution - Degrees of freedom for ANOVA

Central Limit Theorem

Chi-Square Tests

Cohen's d

• Quiz - Definition and calculation of Cohen's d
• Quiz - Cohen's d for multiple comparisons

Confidence Interval

• Instruction - Formula for confidence interval when sigma is known (z-table)
• Solution - Find 95% confidence interval when sigma is known (z-table)
• Solution - 95% confidence interval when sigma is not known (t-table)
• Solution - Confidence interval for dependent samples (t-test)
• Quiz - Confidence interval for true correlation coefficient (rho)

Constructs

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

Correlation coefficient

Cramer's V (see "Chi-Square Tests")

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 - Four possible situations
• Quiz - Type I and Type II errors
• Quiz - Probability of Type I error

Degrees of Freedom

• Instruction - Degres of freedom and sample standard deviation
• Solution - Degrees of freedom for ANOVA
• Quiz - Degrees of freedom for chi-square tests

Distribution

Eta-Squared (see "ANOVA")

F-Table

Frequency

• Quiz - Tally the frequency

Histogram

Hypotheses

Hypothesis Testing

• Instruction - One-tailed versus two-tailed tests
• Quiz - Z-test
• Quiz - One-sample t-test
• Quiz - Two-sample t-test statistic
• Solution - Pooled variance for two-sample t-tests
• Quiz - Correlation coefficient (rho)

Interval estimate (see “Confidence Interval”)

Lurking variables

• Solution - Lurking variables are extraneous factors

Margin of error

• Instruction - Definition of “margin of error”
• Quiz - Margin of error for t-test

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

Null Hypothesis (see "Hypotheses")

Operational definition

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

Outlier

• Quiz - Formal definition of “outlier”

P-Value

• Quiz - Probability of Type I error
• Quiz - P-value for one- and two-tailed tests
• Quiz - Visualize p-value

Pearson's r (see "Correlation coefficient")

Percentile

Point estimate

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

Pooled Variance (see "Hypothesis Testing")

Probability

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

Random

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

Regression

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?
• Quiz - Standard error for independent samples with pooled variance

Sum of Squares

• Quiz - Formula for sum of squares

t-Table

t-Tests

• Instruction - One-sample t-test
• Solution - Calculate t-statistic
• Instruction - Dependent samples t-test
• Quiz - Difference between dependent and independent samples t-tests
• Quiz - Independent samples t-statistic

Tukey's HSD

• Instruction - Intro to multiple comparison tests and Tukey's HSD
• Quiz - Calculate Tukey's HSD
• Quiz - Interpret Tukey's HSD

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

Variance

• Solution - Definition of “variance”
• Quiz - Pooled variance

Z-scores

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

Z-table

Z-Tests