Logo
Home Study Material Contact Search
AI Chat FREE
  1. mathematics
  2. statistics
  3. a doctor wants to estimate the mean hdl cholestero

A doctor wants to estimate the mean HDL cholesterol of all? 20- to? 29-year-old females. How...

Free

50.1K

Verified Solution

Question

Statistics

A doctor wants to estimate the mean HDL cholesterol of all? 20-to? 29-year-old females. How many subjects are needed to estimatethe mean HDL cholesterol within 3 points with 99 % confidenceassuming s equals 12.4 based on earlier? studies? Suppose thedoctor would be content with 95 % confidence. How does the decreasein confidence affect the sample size? required? LOADING... Clickthe icon to view a partial table of critical values. A? 99%confidence level requires 64 subjects. ?(Round up to the nearest?subject.) A 95 % confidence level requires 37 subjects. ?(Round upto the nearest? subject.) How does the decrease in confidenceaffect the sample size? required? A. The sample size is the samefor all levels of confidence. B. Decreasing the confidence levelincreases the sample size needed. C. Decreasing the confidencelevel decreases the sample size needed.

Answer & Explanation Solved by verified expert
4.3 Ratings (554 Votes)

for 99% CI

for 99 % CI value of z= 2.576
standard deviation ?= 12.40
margin of error E = 3
required sample size n=(z?/E)2                                         = 114.0

for 95% CI:

for 95 % CI value of z= 1.960
standard deviation ?= 12.40
margin of error E = 3
required sample size n=(z?/E)2                                         = 66.0

from above:

A? 99% confidence level requires 114 subjects

A 95 % confidence level requires 66 subjects.

C. Decreasing the confidence level decreases the sample size needed.
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

Finance
1.2K views

What are the three types of financial management decisions and what questions are they designed to...

Biology
1.2K views

Which of the following is NOT a subphylum of the Arthropoda Chelicerata Uniramia Gastropoda

Geometry
1.2K views

E H diagram K I F D G J If EG and HJ are parallel...

Basic Math
1.2K views

A school is organizing a cookout where hotdogs will be served. The hotdogs come in...

Algebra
1.2K views

Use the remainder theorem and synthetic division to find f k for the given value...

Accounting
1.2K views

Down Under Products, Limited, of Australia has budgeted sales...

Accounting
1.2K views

I would really appreciate if you could go over every step of the process! ...

Accounting
1.2K views

Problem 12-23 Make or Buy Decision [LO12-3] Silven Industries, which manufactures and sells a highly...

Accounting
1.2K views

Chloes Cafe bakes croissants that it sells to local restaurants and grocery stores. The average...

Accounting
1.2K views

Please review the recent revision on the US revenue recognition policy (issued in May 2014)...

Accounting
1.2K views

Look at the following process for matching and adding a deposit transaction from a bank...

Accounting
1.2K views

Answer and show your solution The existing capital balances of...