Does memory training help? 32 randomly selected seniors were given a list of words and 3 minutes to memorize as many as possible by just rereading the words. They then recorded as many words as they could remember. Next, they were given another list of words to memorize for 3 minutes using a memorization strategy and repeated the process. Each student calculated the difference in the # words (Strategy 2 – Strategy 1). The mean of the differences was 1.5 and the standard deviation of the differences was 2.7. Do these data give convincing evidence that strategy 2 improves memory at the α = 0.05 significance level?
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.
- Does memory training help? 32 randomly selected seniors were given a list of words and 3 minutes to memorize as many as possible by just rereading the words. They then recorded as many words as they could remember. Next, they were given another list of words to memorize for 3 minutes using a memorization strategy and repeated the process. Each student calculated the difference in the # words (Strategy 2 – Strategy 1). The
mean of the differences was 1.5 and the standard deviation of the differences was 2.7. Do these data give convincing evidence that strategy 2 improves memory at the α = 0.05 significance level?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
