Undertake a survey of residents opinions regarding the siting of a new supermarket in an inner city suburb (estimated catchment population 106619 at the last census). The age and gender distribution of the catchment population at the last census in listed below: Age group 6-120 21-27 | 28-32 33-44 45-60 61-74 9012 8250 Gender 0-5 75+ 11992 4072 9002 Males 3408 Females 3321 7143 6223 4582 8356 2584 6482 8160 9344 4688 a) Devise a quota for a quota sample using these data.
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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