The data below is the ages of a population of 30 residents at a condominium. 28 34 15 62 54 55 47 39 20 17 38 56 48 20 37 46 35 44 56 72 48 32 16 28 47 70 62 48 35 26 1. Construct a stem-and-leaf chart; 2. Find the mode of the data set; 3. Calculate the mean age of the residents; 4. Compute the population standard deviation of the ages of the residents given the formula for population variance.
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 data below is the ages of a population of 30 residents at a condominium.
28 34 15 62 54
55 47 39 20 17
38 56 48 20 37
46 35 44 56 72
48 32 16 28 47
70 62 48 35 26
1. Construct a stem-and-leaf chart;
2. Find the
3. Calculate the mean age of the residents;
4. Compute the population standard deviation of the ages of the residents given the formula for population variance.
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