TABLE 17-8 Recently, a University Switched to a New Type of Computer-Based

question 67

Short Answer

TABLE 17-8
Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows.
-Referring to Table 17-8, an R chart is to be constructed for the time required to register. One way to create the lower control limit involves multiplying the mean of the sample ranges by D₃. For this data set, the value of D₃ is ________.

---

Definitions:

Alternative Hypothesis

A statement that suggests a possible difference or effect, typically to be tested against a null hypothesis in statistical analysis.

Null Hypothesis

In statistics, a hypothesis that posits no effect or no difference, and the assumption that any deviations from this are due to chance.

Hypothesis Testing

A method of statistical inference used to decide whether a hypothesis about a parameter in a population is likely to be true, based on sample data.

U.S. Legal System

The U.S. Legal System is the framework of laws and institutions that govern the United States, including federal and state courts, laws, and regulations.