Which research question below is appropriate for a related-samples t test? a. to compare the scores on a optimism measure between two universities b. to compare the level of sat scores at the beginning of a preparation class to their sat scores at the end of the class c. to compare the level of honesty (based on an honesty scale) in politicians to the level of honesty in students d. to examine the association between liking for energy drinks and tendency to be a “morning person” among a group of students
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.
| a. |
to compare the scores on a optimism measure between two universities
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| b. |
to compare the level of sat scores at the beginning of a preparation class to their sat scores at the end of the class
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| c. |
to compare the level of honesty (based on an honesty scale) in politicians to the level of honesty in students
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| d. |
to examine the association between liking for energy drinks and tendency to be a “morning person” among a group of students
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