Elementary Statistics Chapter 6 Test C

# Elementary Statistics Chapter 6 Test C - Elementary...

• Test Prep
• 6
• 100% (1) 1 out of 1 people found this document helpful

This preview shows pages 1–3. Sign up to view the full content.

Elementary Statistics Chapter 6 Test - Form C Name:___________________________ Course Number: __________ Section Number: _____ SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Provide an appropriate response. 1) How do you determine whether to use the z or t distribution in computing the margin of error, E = z a/2 œ s n or E = t a/2 œ s n ? 2) The Bide-a-While efficiency hotel, which caters to business workers who stay for extended periods of time (weeks or months), offers room service. In a small study of 35 randomly selected room service orders, the 95% confidence interval for mean delivery time for room service is 24.8 < m < 29.6 minutes. The marketing director is trying to determine if she can advertise "room service in under 30 minutes, or the order is free." How would you advise her? 3) Explain how confidence intervals might be used to make decisions. Give an example to clarify your explanation. 4) Why is s2 the best point estimate of s2 ? MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Solve the problem. 5) Find the value of -za/2 that corresponds to a level of confidence of 96.68 percent. A) 2.13 B) -1.84 C) 0.0166 D) -2.13 6) The following confidence interval is obtained for a population proportion, p: (0.283, 0.323) Use these confidence interval limits to find the point estimate, p^ . A) 0.323 B) 0.308 C) 0.283 D) 0.303

This preview has intentionally blurred sections. Sign up to view the full version.

Find the margin of error for the 95% confidence interval used to estimate the population proportion. 7) In a survey of 5400 T.V. viewers, 30% said they watch network news programs. A) 0.00915 B) 0.0140 C) 0.0122 D) 0.0160 Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p.
This is the end of the preview. Sign up to access the rest of the document.
• Spring '16
• Christy Turner

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern