-What proportion of women get scores between 30 and 45? -What proportion of men get scores over 68? -What score demarcates the upper 10% of wormen? Here are the scores Males Females Mean 60 40 Standard Deviation 12 10 People in Sample 138 97
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.
How do I solve these problems?
-What proportion of women get scores between 30 and 45?
-What proportion of men get scores over 68?
-What score demarcates the upper 10% of wormen?
Here are the scores
| Males | Females | |
| Mean | 60 | 40 |
| Standard Deviation | 12 | 10 |
| People in Sample | 138 | 97 |
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