Suppose the mean of a math exam score is 70 with a standard deviation of 20. If each score is increased by 2 and then each result is multiplied by 1.05, then new mean and standard deviation are O a. µ = 76.5 and o = 20.1 O b. µ = 75.6 and o = 21.0 O C.µ = 75.6 and o = 20.0 O d. µ = 75.6 and o = 22.6 e.µ = 72.0 and o = 22.0
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.
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