Joaquin is a psychology graduate student. One of his classes requires him to run experiments in a rat-training lab. He recently completed a research assignment in which he compared the maze-running speed of three groups of rats who were given different types of food. His analysis of variance showed that there was a significant difference among the groups. His professor advised him that he needed to follow up with post-tests. Why did Joaquin's professor insist that he do post-tests? Answer Choices: To determine whether a Type I error was committed To determine how much difference exists between the treatments To determine which treatments are significantly different None of these
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
Joaquin is a psychology graduate student. One of his classes requires him to run experiments in a rat-training lab. He recently completed a research assignment in which he compared the maze-running speed of three groups of rats who were given different types of food. His analysis of variance showed that there was a significant difference among the groups. His professor advised him that he needed to follow up with post-tests. Why did Joaquin's professor insist that he do post-tests?
Answer Choices:
To determine whether a Type I error was committed
To determine how much difference exists between the treatments
To determine which treatments are significantly different
None of these
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