chiatrist reads that the average age of someone who’s first diagnosed with schizophrenia is 24 years, with a standard deviation of 2 years. The psychiatrist suspects that the schizophrenic patients in her clinic were diagnosed at a younger age than 24. She examines records for a random sample of clinic patients and finds that the age at first diagnosis in the sample is 23.5 years on average. W
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.
A psychiatrist reads that the average age of someone who’s first diagnosed with schizophrenia is 24 years, with a standard deviation of 2 years. The psychiatrist suspects that the schizophrenic patients in her clinic were diagnosed at a younger age than 24. She examines records for a random sample of clinic patients and finds that the age at first diagnosis in the sample is 23.5 years on average. What test should be used to analyze this data?
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