What is the age distribution of adult shoplifters 21 years ans older in supermarkets? The following is based on information taken from the national retail federation. A random sample of B95 incidents of shoplifting gave the following age distribution. Estimate the mean age, sample variance, and sample standard deviation for the shoplifters. For the class 41 and over use 45.5 as the class midpoint. Round answers to one decimal place. Find= X S^2 S Age range 21-30 31-40 41 and over Number of shoplifters 261 346 288
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.
What is the age distribution of adult shoplifters 21 years ans older in supermarkets? The following is based on information taken from the national retail federation. A random sample of B95 incidents of shoplifting gave the following age distribution. Estimate the mean age, sample variance, and sample standard deviation for the shoplifters. For the class 41 and over use 45.5 as the class midpoint. Round answers to one decimal place.
Find=
X
S^2
S
| Age |
21-30 | 31-40 | 41 and over | |
| Number of shoplifters | 261 | 346 | 288 |
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