TABLE 8-12
The president of a university is concerned that the percentage of students who have cheated on an exam is higher than the 1% acceptable level. A confidential random sample of 1,000 students from a population of 7,000 revealed that 6 of them said that they had cheated on an exam during the last semester.
-Referring to Table 8-12, using on the 90% one-sided confidence interval, the superintendent can be 85% confident that no more than 1% of the students at the university had cheated on an exam during the last semester.

Question

Quizplus · Accepted Answer

The confidence interval is 0.001 to 0.019, which means that the president can be 85% confident that the true percentage of students who have cheated on an exam is between 0.1% and 1.9%. Since the upper bound of the confidence interval is less than 1%, the president can conclude that the percentage of students who have cheated on an exam is not higher than the 1% acceptable level.

TABLE 8-12 The President of a University Is Concerned That the Percentage