given data. A state university wants to increase its retention rate of 4% for graduating students from the previous year. After implementing several new programs during the last two years, in 2004 the university reevaluated its retention rate using a random sample of 391 students and found the retention rate at 5%. Create a 95% confidence interval for the proportion of students (in 2004) who had been retained. OA Based on the data, we are 95% confident the proportion of students in 2004 who had been retained is between 1.96% and 7.05%. O B. Based on the data, we are 95% confident the proportion of students in 2004 who had been retained is between 2,84% and 7.16%. OC. Based on the data, we are 95% confident the proportion of students in 2004 who had been retained is between 0.70% and 7.16%. O D. Based on the data, we are 95% confident the proportion of students in 2004 who had been retained is between 4% and 6%. OE Based on the data, we are 95% confident the proportion of students in 2004 who had been retained is between 0.70% and 4.41%.
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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