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Random Variables, Sampling Distributions, Confidence Intervals, and Hypothesis Testing: Key Concepts for Business Statistics

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Discrete Random Variables

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

Binomial Distribution

  • Guided course
    The Binomial Experiment Example 1
    02:58
  • Guided course
    Mean & Standard Deviation of Binomial Distribution
    03:28
  • Guided course
    Finding Binomial Probabilities Using TI-84 Example 1
    03:33

Poisson Distribution

  • Guided course
    Finding Probabilities Using the Poisson Distribution Example 2
    05:06
  • Guided course
    Finding Probabilities Using the Poisson Distribution Example 1
    06:34
  • Guided course
    Finding Probabilities Using the Poisson Distribution
    03:10

Hypergeometric Distribution

  • Guided course
    Introduction to the Hypergeometric Distribution
    05:15
  • Guided course
    Introduction to the Hypergeometric Distribution Example 1
    03:44

Standard Normal Distribution

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

Sampling Distribution of the Sample Mean and Central Limit Theorem

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

Sampling Distribution of Sample Proportion

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

Introduction to Confidence Intervals

  • Guided course
    Critical Values: z Scores
    04:46
  • Guided course
    Introduction to Confidence Intervals
    06:33

Confidence Intervals for Population Mean

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

Confidence Intervals for Population Proportion

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

Determining the Minimum Sample Size Required

  • Guided course
    Determining the Minimum Sample Size Required
    06:51

Steps in Hypothesis Testing

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

Performing Hypothesis Tests: Means

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

Performing Hypothesis Tests: Proportions

  • Guided course
    Performing Hypothesis Tests: Proportions Example 1
    03:32
  • Performing Hypothesis Tests: Proportions
    05:52
  • Performing Hypothesis Tests: Proportions Example 1
    07:06