Guess Actual Age 18 15 25 28 28 24 39 42 50 56 36 45 72 80
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.
Mrs. Pearce conducted a survey in her class on the ages of famous people. The table below shows the results of her survey.
Which equations could best represent the line-of-best-fit for the given data set?
y = 1.19x − 4.3
y = 0.81x + 4.56
y = −1.19x + 4.3
y = −0.81x − 4.56
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