A survey of 9 retirees was taken. Among other things, the retirees were asked to report the age at which they retired. Here are those 9 ages (in years): 62. 59. 64, 72, 75, 64, 70, 64, 68 Send data to calculator Send data to Excel (a) what is the median of this data set? your anser an integer round your ansvrer to one decimal place. (b) what is the mean of this data set? your aner net an n integer, round your anser to one decimal place. O ero modes (e) How many modes does the data set have. and what are their values? Indicate the number of modes by cicking in the appropriate circle, and then indicate the value(a) of the mode(s). fapplicable O ene mode O bve modes Oand0
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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