How do you Analyse test scores?
The analysis shows:
- A test summary – points possible, the number of possible questions, the number of attempts in progress, the number of completed attempts, the average score and average time taken to complete the test.
- Discrimination data – the number of good, fair, and poor questions.
How do you report statistical analysis results?
Every statistical test that you report should relate directly to a hypothesis. Begin the results section by restating each hypothesis, then state whether your results supported it, then give the data and statistics that allowed you to draw this conclusion.
What is XBAR formula?
In statistics you’ll come across slightly different notation than you’re probably used to, but the math is exactly the same. The formula to find the sample mean is: = ( Σ xi ) / n. All that formula is saying is add up all of the numbers in your data set ( Σ means “add up” and xi means “all the numbers in the data set).
How many Sigma is 1.67 Cpk?
Sigma level table
| Two sided table | ||
|---|---|---|
| Cpk Ppk | Sigma level | PPM out of tolerance |
| 1.33 | 4.0 | 63.342 |
| 1.50 | 4.5 | 6.795 |
| 1.67 | 5.0 | 0.573 |
What is CP CPK?
Cp and Cpk, commonly referred to as process capability indices, are used to define the ability of a process to produce a product that meets requirements. Specifications: Specifications define product requirements. In other words, they define what is expected from an item for it to be usable.
What is CPK and how is it calculated?
Cpk is a process capability index used to measure what a process is capable of producing. The formula for the calculation of Cpk is Cpk = min(USL – μ, μ – LSL) / (3σ) where USL and LSL are the upper and lower specification limits, respectively.
What does a Cp of 1.5 mean?
greater than one