In this video I explain the logic of null hypothesis significance testing and how researchers use a null hypothesis and a comparison distribution or sampling distribution in order to assess the probability of a particular test statistic or calculation. Video … Read More
How to Use a Z-Table (Standard Normal Table)
In this video I explain how to use a z-table or a standard normal table in order to calculate the percentage of scores below, above, or between z-scores for a normal distribution. Finding the areas under the curve associated with … Read More
The Standard Normal Curve, Empirical Rule, & Z-Scores
In this video I explain how we can use the equation for a normal curve to generate a probability density function and use that to estimate probabilities. While normal curves may differ in where they are centered and how spread … Read More
What is a Probability Density Function?
In this video I explain probability density functions and how these are used to describe the distribution of a population and estimate the probabilities for different ranges of scores within that distribution. I also explain why the probability for a … Read More
How Are Moments Used in Statistics?
In this video I explain how moments are used in statistics in order to describe the characteristics of a distribution. The first four moments help to tell us about the mean, variance, skew, and kurtosis of a distribution and allow … Read More
What is Kurtosis?
In this video I explain the concept of kurtosis. I explain the terminology for kurtosis coined by Karl Pearson, a number of common misconceptions related to kurtosis, how kurtosis is calculated for a sample, and how kurtosis is interpreted for … Read More
How to Calculate Skew
In this video I explain two formulas for calculating skew: Pearson’s Median Skewness or Pearson’s 2nd equation for skew, and the Adjusted Fisher-Pearson Standardized 3rd Moment Coefficient for skew. I also explain some general guidelines for interpreting skew values, as … Read More
Treatment of Mental Illness Practice Questions
This video covers 10 practice multiple choice questions on the treatment of mental illness and includes questions related to therapeutic approaches, pharmaceuticals, & efficacy of treatments. I hope this can help you to review your knowledge and understanding, let me … Read More
Psychological Disorders Practice Questions
This video covers 10 practice multiple choice questions on psychological disorders and includes questions related to diagnosis, symptom types, specific disorders, and more. I hope this can help you to review your knowledge and understanding, let me know if you … Read More
Stress & Health Psychology Practice Questions
This video covers 10 practice multiple choice questions on stress & health psychology and includes questions related to immune function, personality, stress management, coping strategies, and more. I hope this can help you to review your knowledge and understanding, let … Read More