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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