Basic Statistics Timed Question 7. Need in 50 Minutes!

Oct 25th, 2015
Anonymous
Category:
Mathematics
Price: $10 USD

Question description

Question 7

A health insurer wants to know if having a nurse available to answer simple questions over a telephone hotline could cut costs by eliminating unnecessary doctor visits. Records show the yearly cost of doctor visits has an SD of $300. They randomly select 225 families, give them access to the hotline, and record the costs of their doctor visits. In this sample, they find the average yearly cost per family to be $820. Find a 95% confidence interval for the yearly population average cost of doctor visits per family.

Approximately from $820 to $860

Approximately from $800 to $880

Approximately from $810 to $870

Approximately from $780 to $860


Tutor Answer

(Top Tutor) James M847
School: UT Austin
PREMIUM TUTOR

Studypool has helped 1,244,100 students

Review from student
Anonymous
" Thanks, good work "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1822 tutors are online

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors