Logo
Home Study Material Contact Search
AI Chat FREE
  1. mathematics
  2. statistics
  3. a)a sample of 30 patients in a doctor's office sho

a)A sample of 30 patients in a doctor's office showed that they had to wait an...

90.2K

Verified Solution

Question

Statistics

a)A sample of 30 patients in a doctor's office showed that theyhad to wait an average of 35 minutes before they could see thedoctor. The sample standard deviation is 9 minutes. Assume thepopulation of waiting times is normally distributed.At 90%confidence, compute the margin of error.

b)Consider the population of electric usage per month forhouses. The standard deviation of this population is 119kilowatt-hours. What is the smallest sample size to provide a 90%confidence interval for the population mean with a margin of errorof 32 or less? (Enter an integer number.)

Answer & Explanation Solved by verified expert
4.0 Ratings (576 Votes)
solutionaGiven that 35s 30n 9Degrees of freedom df n 1 9 1 8At 90 confidence level the t is    See Answer
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Calculus
1.2K views

Sketch the plane curve r(t) = ti+tj and the vectors T(t) and N(t) when t...

Biology
1.2K views

Which of the following are structural isomers of each other?A ribose and pentoseB, glucose and...

Physics
1.2K views

A block of ice and a solid uniform sphere, each having the same mass, start...

Physics
1.2K views

A force among many other forces is delivering power to a body of mass 1...

Geometry
1.2K views

Express cos C as a fraction in simplest terms A 22 B 39

Basic Math
1.2K views

Translate these statements into English where R x is x is a rabbit and H...

Statistics
1.2K views

5 The diameter of chocolate chip cookies from a local bakery are normally distributed with...

Calculus
1.2K views

A 2 4 8 10 16 rt or to make the given statement true 0...

Accounting
1.2K views

Assume current assets totaled $49,000 and the current ratio was 1.2...

Accounting
1.2K views

Shrute BnB-Tally Number of rooms 180 2019 228 ADR OCC RevPAR 82% 186.96 New Revenues...

Accounting
1.2K views

Champ Incorporated budgets the following sales in units for the coming two months. Each months...

Accounting
1.2K views

Determine the dollar sales for May given the following seasonal sales distribution