A hospital is using X bar and R charts to record the time it takes to process patient account information. A sample of five applications is taken each day. The first four weeks’ (20 days’) data give the following values: =16 min =7 min If the upper and lower specifications are 21 minutes and 13 minutes respectively, calculate , Cp and Cpk. Interpret the indices.
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 hospital is using X bar and R charts to record the time it takes to process patient account information. A sample of five applications is taken each day. The first four weeks’ (20 days’) data give the following values:
=16 min =7 min
If the upper and lower specifications are 21 minutes and 13 minutes respectively, calculate , Cp and Cpk. Interpret the indices.
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
