User Account

All Pages

Confidence affect the sample size required

Assignment Help Basic Statistics
Reference no: EM131191204

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

(a) How many subjects are needed to estimate the HDL cholesterol within 2 points with 99% confidence assuming σ=14.2?

(b) Suppose the doctor would be content with 90% confidence.

(c) How does the decrease in confidence affect the sample size required?

Reference no: EM131191204

Questions Cloud

Which accounting principle justifies given treatment : A business reports its own office stationery on the balance sheet at its $ 400 cost, although it cannot be sold for more than $ 10 as scrap paper. Which accounting principle and/ or assumption justifies this treatment?
Compute and display the average of all four tests : write an algorithm that gets four numbers corresponding to scores received on three semesters tests and a final examination . your algorithm should compute and display the average of all four tests weighting the final exam twice s heavily as a reg..
Explain of the importance of medical informatics : Define and explain of the importance of medical informatics. What impact does medical informatics have on the quality of care of patients?
Journalize the annual adjusting entries that were made : Journalize the annual adjusting entries that were made. Prepare an income statement and a statement of retained earnings for the year ending December 31, 2014 and an unclassified balance sheet at December 31.
Confidence affect the sample size required : (a) How many subjects are needed to estimate the HDL cholesterol within 2 points with 99% confidence assuming σ=14.2? (b) Suppose the doctor would be content with 90% confidence. (c) How does the decrease in confidence affect the sample size require..
Is the cost of hiring the band a fixed or a variable cost : What are the total band cost and the cost per person if concert attendance is 2,000, 2,500, 3,000, 3,500, or 4,000?- Is the cost of hiring the band a fixed or a variable cost?
Normally distributed with a standard deviation : The mean incubation time for a type of fertilized egg kept at 100.5°F is 23 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 1 day.
What is the probability that those three horses finish first : A horse race has 10 entries and one person owns 3 of those horses. Assuming that there are no ties, what is the probability that those three horses finish first, second and third (regardless of order)? (Round to four decimal places as needed.)
Do you agree with your friends analysis : A friend of yours has just purchased a house and has taken out a $50,000, 11 percent mortgage, payable at $476.17 per month.- Do you agree with your friend's analysis? Explain.

Reviews

Write a Review

Basic Statistics Questions & Answers

  They select every 20th person from the list until a sample

a polling company obtains an alphabetical list of names of voters in a precinct. they select every 20th person from

  Conduct and interpret the appropriate analysis

A researcher was interested in the attitudes towards equal rights among stay at home moms and women with jobs outside the home. She creates a survey that measures attitudes toward equal rights, administers it to a sample of 20 women. Conduc..

  A probabilistic model of fracture in concrete and size

The article "A Probabilistic Model of Fracture in Concrete and Size Effects on Fracture Toughness" (Magazine of Concrete Res., 1996: 311-320) gives arguments for why fracture toughness in concrete specimens should have a Weibull distribution and p..

  Suppose that during a manufacturing process a certain

suppose that during a manufacturing process a certain proportion of the products are flawed and have to be rejected by

  Least squares for fitting trends in an annual time series

If you are using the method of least squares for fitting trends in an annual time series containing 25 consecutive yearly values.

  Probability that sample percentage of correct identification

Which is more likely to occur-more than 60% correct identifications in the sample of 200 or more than 55% correct identifications in a sample of 1,000? Explain.

  Ten equally qualified marketing assistants are candidates

ten equally qualified marketing assistants are candidates for promotion to associate buyer seven are men and three are

  The following linear regression equations are estimated

1 an open label study where participant are aware of the treatment they are taking is conducted to assess the time

  Two population variances-media matrix and jupiter

Media Matrix and Jupiter Communications gathered data on the time adults and the time teens spend online during a month (USA Today, September 14, 2000).

  Normal distribution with mean equal

If we take many samples, the sample mean x varies from sample to sample according to a Normal distribution with mean equal to the unknown mean score μ in the population.What is the standard deviation of this sampling distribution?

  John retired a little less than a year ago after 25 years

1.last week john quinn sat back in a chair with his feet on his deck and nodded at his wife kate. they had just

  About 72 of all female heart transplant patients will

1. in a random sample of 24 people the mean number of books they had read in the past year was 11.22 books and the

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd