User Account

All Pages

How are confidence intervals calculated

Assignment Help Basic Statistics
Reference no: EM131008566

A 95% confidence interval is not so much a statement about any particular interval, such as (79.3, 80.7), but pertains to what would happen if a very large number of like intervals were to be constructed. That is, from a practical point of view, the 95% gives the fraction of the time, in repeated sampling, that the intervals constructed will contain the target parameter µ. How are confidence intervals calculated?

Reference no: EM131008566

Questions Cloud

Problem regarding the house sales : The realty company in Exercise 21b looks at a recent sample of houses that have sold. On testing the null hypothesis that 50% of the houses take more than three months to sell against the hypothesis that more than 50% of the houses take more than ..
Pyramid construction company has used the completed contract : Prepare the 2011-2010 comparative statements of shareholders' equity. (Hint: The 2009 statements reported retained earnings of $36,000. This is $60,000 - [$60,000 × 40%].
What is the value of the correlation coef?cient : Predict the volume of cerebral grey matter at age 2 to 5 years for a child whose head circumference z score at age 12 months was 1.8. Explain why it would not be a good idea to use the least-squares line to predict the volume of grey mat- ter..
Correct percentage of on-time deliveries : There's a 22% chance that the sample they drew shows the correct percentage of on-time deliveries There's a 22% chance that natural sampling variation could produce a sample with an observed proportion of on-time deliveries such as the one they obt..
How are confidence intervals calculated : A 95% confidence interval is not so much a statement about any particular interval, such as (79.3, 80.7), but pertains to what would happen if a very large number of like intervals were to be constructed. How are confidence intervals calculated
Prepare the journal entry to record the change in accounting : Assume that Weihrich used FIFO before 2011, and then in 2011 decided to switch to average cost. Prepare the journal entry to record the change in accounting principle and briefly describe any other steps Weihrich should take to appropriately report t..
Proportion of houses : A realty company recently announced that the proportion of houses taking more than three months to sell is now greater than 50%. A financial firm's accounting reports that after improvements in their system, they now have an error rate below 2%.
Reject the null hypothesis : For each of the following situations, state  whether a Type I, a Type II, or neither error has been made. a) A test of H0: m = 25 vs. HA: m 7 25 rejects the null hypothesis. Later it is discovered that m = 24.9. b) A test of H0: p = 0.8 vs. HA: p 6 0..
Solve the constant-coefficient equation : Solve the constant-coefficient equation in u to find two linearly independent solution. Use part (b) to find solution of the DE when a = 1 and b = -1/2. FInd the solution when y(1) = 0 and y'(1) = 1.

Reviews

Write a Review

Basic Statistics Questions & Answers

  A researcher wantd to compare the pulse rate of identical

a researcher wantd to compare the pulse rate of identical twins to see wether there was any differece. eight sets of

  A srs of 21 orangutans is selected and 65 cc of blood is

a srs of 21 orangutans is selected and 65 cc of blood is drawn from each orangutan using a 100 cc syringe. this method

  Determining the sum of probabilities

Determine the sum of these probabilities , and why is the  number less than 1

  Eptember energy consumption levels for single family homes

Findout the consumption level separating the bottom 45% to the top 55%. The September energy consumption levels for single family homes are found to the normally distributed with a mean

  Set up the null and the alternative hypotheses

New soft drink is being market tested. A sample of 400 individuals participated in the taste test and 100 indicated that they like the taste. Set up the null and the alternative hypotheses.

  Expected number of sightings

The number of UFO (Unidentified Flying Object) sightings per week in Roswell, NM is a random variable with the cumulative distribution function given below.

  Psychology course is a poisson random variable

The number of students that enroll in a psychology course is a poisson random variable with mean 100.the course incharge has decided that if the enrolling is 120 or more he will teach the course in two separate sections.

  What percent of users wait between five and ten seconds

If we assume that the download times are normally distributed, what percent of users will wait between 5 and 10 seconds for the homepage to download?

  Minimise cost of achieving minimum total exposure

Use the auxiliary variable approach to model this problem and write a short memo to the marketing manager explaining the solution and sensitivity information.

  Explain how difference may have been caused by treatments

If there is a difference between the two groups of scores. Briefly explain how the difference may have been caused by the treatments.

  If the same mean is 11 the hypothesized population mean 10

if the same mean is 11 the hypothesized population mean 10 and the population standard deviation is 4 compute the test

  Important effect of removing the outlier

a) Find the 95% confidence interval for the population mean based on the 37 patients who remain after you drop the outlier. b) Compare your interval in (a) with your interval from Exercise 18.32. What is the most important effect of removing the ou..

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