Heip A study on the personality characteristics of drug dealers sampled 100 convicted drug dealers and scored them each on the Wanting Recognition (WR) Scale, which provides a quantitative measure of a person's need for approval and sensitivity to social situations. (Higher scores indicate a greater need for approval.) The sample of drug dealers had a mean WR score of 56, with a standard deviation of 5. Use this information to find an interval estimate of the mean WR score for all convicted drug dealers. Use a confidence level of 99%. Interpret the result. Construct a 99% confidence interval and interpret the result. (Round to two decimal places as needed.) O A. The 99% confidence interval for mean WR score indicates that the true mean WR score for convicted drug dealers is between and with 99% confidence. O B. The 99% confidence interval for mean WR score indicates that 99% of all drug dealers have a WR score between and O C. The 99% confidence interval for mean WR score indicates that 99% of convicted drug dealers have a WR score between and and with 99% confidence. O D. The 99% confidence interval for mean WR score indicates that the true mean WR score for all drug dealers is between
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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