A Company Is Researching the Effectiveness of a New Website

question 93

Multiple Choice

A company is researching the effectiveness of a new website design to decrease the time to access
A website. Five website users were randomly selected, and their times (in seconds) to access the
Website with the old and new designs were recorded. To compare the times, they computed (new
Website design time - old website design time) . The results follow:
What are the null and alternative hypothesis?

• A) H0: µd = 0; H1: µd ≠ 0
• B) H0: µd ≠ 0; H1: µd = 0
• C) H0: µd ≤ 0; H1: µd > 0
• D) H0: µd ≥ 0; H1: µd ≠ 0
• E) H0: µd ≥ 0; H1: µd < 0

---

Definitions:

High Blood Pressure

A medical condition where the blood pressure in the arteries is persistently elevated, which can lead to serious health issues if not managed properly.

Margin of Error

An expression of the amount of random sampling error in a survey's results, which describes how closely the sample estimate matches the true value in the whole population.

Liberal Party

A political party that generally advocates for policies promoting social welfare, individual rights, and government intervention in the economy to promote social justice.

Confidence Interval

A range of values, derived from sample data, that is likely to contain the value of an unknown population parameter, with a specified level of confidence.