The following data represent the statistics grades along with scores on an intelligence test of 8 students: IQ score 70 59 65 55 70 65 70 55 Statistics grade 85 74 76 74 85 87 94 70 Construct a scatter plot and comment about nature of relation between IQ score and statistics grade. Compute the correlation coefficient and comment on the result.
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.
The following data represent the statistics grades along with scores on an
intelligence test of 8 students:
IQ score 70 59 65 55 70 65 70 55
Statistics grade 85 74 76 74 85 87 94 70
Construct a
and statistics grade. Compute the
result.
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