Mai collects information about 37 classmates. She believes her data set is perfectly symmetrical with a mean and median of 20. She then realizes that the number she has recorded as 32 was actually supposed to be 42. What is true about the mean and median of her corrected data set? A: The mean and median of the corrected set are both still 20. B: The mean of the corrected data set is still 20, but the median is greater than 20. C: The median of the corrected data set is still 20, but the mean is greater than 20. D: The mean and median of the corrected set are both greater than 20.
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.
Mai collects information about 37 classmates. She believes her data set is perfectly symmetrical with a
The mean and median of the corrected set are both still 20.
The mean of the corrected data set is still 20, but the median is greater than 20.
The median of the corrected data set is still 20, but the mean is greater than 20.
The mean and median of the corrected set are both greater than 20.
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