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Business Statistics: Random Variables, Probability Models, Normal Distributions, and Inference

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Discrete Random Variables

  • Percorso guidato
    Variance & Standard Deviation of Discrete Random Variables
    04:48
  • Percorso guidato
    Expected Value (Mean) of Random Variables Example 2
    03:26
  • Percorso guidato
    Intro to Random Variables & Probability Distributions Example 1
    03:06

Standard Normal Distribution

  • Percorso guidato
    Probabilities Between Two Values
    03:50
  • Percorso guidato
    Finding Standard Normal Probabilities using z-Table
    09:47
  • Percorso guidato
    Z-Scores from Probabilities
    08:50

Non-Standard Normal Distribution

  • Percorso guidato
    Finding Values of Non-Standard Normal Variables from Probabilities
    04:05
  • Percorso guidato
    Finding Values of Non-Standard Normal Variables from Probabilities Example 2
    06:05
  • Percorso guidato
    Finding Z-Scores for Non-Standard Normal Variables Example 1
    09:02

Sampling Distribution of Sample Proportion

  • Percorso guidato
    Sampling Distribution of Sample Proportion
    05:11
  • Percorso guidato
    Using the Normal Distribution to Approximate Binomial Probabilities Example 1
    03:21
  • Percorso guidato
    Using the Normal Distribution to Approximate Binomial Probabilities
    06:23

Confidence Intervals for Population Proportion

  • Percorso guidato
    Finding a Confidence Interval for a Population Proportion Using a TI84
    02:35
  • Percorso guidato
    Constructing Confidence Intervals for Proportions Example 2
    04:24
  • Percorso guidato
    Constructing Confidence Intervals for Proportions
    05:45

Sampling Distribution of the Sample Mean and Central Limit Theorem

  • Percorso guidato
    Central Limit Theorem Example 1
    02:33
  • Percorso guidato
    Central Limit Theorem
    05:14
  • Percorso guidato
    Sampling Distribution of Sample Mean
    06:53

Confidence Intervals for Population Mean

  • Percorso guidato
    Finding Confidence Intervals Using TI-84
    04:30
  • Percorso guidato
    Critical Values: t-Distribution Example 2
    04:06
  • Percorso guidato
    Population Standard Deviation Unknown Example 3
    09:00

Steps in Hypothesis Testing

  • Percorso guidato
    Intro to Hypothesis Testing
    05:12
  • Percorso guidato
    Step 3: Get P-Value
    06:50
  • Percorso guidato
    Step 2: Calculate Test Statistic
    06:34

Performing Hypothesis Tests: Means

  • Percorso guidato
    Standard Deviation (σ) Known Example 2
    04:53
  • Percorso guidato
    Standard Deviation (σ) Known Example 3
    06:51
  • Percorso guidato
    Standard Deviation (σ) Unknown Example 4
    06:13