Suppose probability samples of size n2 are selected from 1

Assignment Help Basic Statistics
Reference no: EM13606669

Suppose probability samples of size n=2 are selected from {1, 2, 3, 4} with probabilities d1=.4, d2=.4, d3=.1, and d4=.1. Demonstrate that tau_hat is still an unbiased estimator of the population total, but its variance is 81.25.

Reference no: EM13606669

Questions Cloud

The pipe carries oil with a density of 850 kg m3 at a rate : a pipe tapers from a diameter of 0.5 m at the inlet to a diameter of 0.25 m at the outlet and turns by an angle of 45
Consider a cylindrical nickel wire 19 mm in diameter and 32 : consider a cylindrical nickel wire 1.9 mm in diameter and 3.2 times 104 mm long. calculate its elongation when a load
1 students take an average of 45 minutes and standard : 1. students take an average of 45 minutes and standard deviation of 8 minutes to complete a certain statistics test. if
Estimate the mean and standard deviation of the : consider the series-parallel networks depicted below. each system comprises four components. the time-to-failure for
Suppose probability samples of size n2 are selected from 1 : suppose probability samples of size n2 are selected from 1 2 3 4 with probabilities d1.4 d2.4 d3.1 and d4.1.
Given that the elastic modulus and poissons ratio of the : a cylindrical bar of metal having a diameter of 18.4 mm and a length of 192 mm is deformed elastically in tension with
If a drinking water supply contains a sodium concentration : the us food and drug administration fda recommends that adults ingest less than 2.4 g of sodium per day.if a drinking
Calculate the work done during the process determine the : a piston-cylinder device initially contains 1.2 kg of steam with a volume of 0.2 m3. the mass of the piston is such
What is the probability that the selected screw came from : your factory receives 3 lots of screws. there are 100 screws in lot 1 200 in lot 2 and 300 in lot 3. lot 1 contains 1

Reviews

Write a Review

Basic Statistics Questions & Answers

  Confidence interval introduction

What happens to the confidence interval when we go from a 95% confidence level to a 99% confidence level? Is this desirable? When would we want to use a 99% confidence interval?

  What proportion of first seventy digits in table are zero

What proportion of the first 70 digits in the table are 0s (there are 40 digits in line 101 followed by the first 30 in line 102)?

  What score indicates that student has to retake exam

If a random student is chosen what is the probability that he or she scores less than 59? What score indicates that the student has to retake the exam?

  Calculate the mean and variance of xt

Two bonus points for rigorously proving Xt and Xt+1 are not independent. Let Xt=1+et-0.5et-1, t=1,2,3,..., where et~IID N(0,2), variance of et is 2. Calculate the mean of Xt.

  Clculate the t value for independent groups for the

any conclusion drawn for the t-test statistical process is only as good as the research question asked and the null

  A random sample of 49 statistics examinations was taken the

a random sample of 49 statistics examinations was taken. the average score in the sample was 84 with a variance of

  Data are contained in the data file called greenfield.

The Greenfield Service Company's marketing director is interested in analyzing the relationship between her company's sales and the advertising dollars spent. In the course of her analysis, she selected a random sample of 20 weeks and recorded..

  Estimation of confidence interval for r-square

If we want to increase our confidence level from 95% to 99%, what happens to our confidence interval?

  Is there evidence that dual degree students

The population variances are 4.6 and 5.0 respectively. Using a level of significance of .05, is there evidence that the dual degree students are receiving lower grades?

  Standard deviation for ounces in the bottles

Calculate the mean, median, and standard deviation for ounces in the bottles and construct a 95% Confidence Interval for the ounces in the bottles.

  Evaluating value of population proportion

Evaluate the value of population proportion. Develop a 99% confidence interval for population proportion.

  Fitting of multiple linear regression equationthe revenues

fitting of multiple linear regression equation.the revenues gained from sales of books from an e-book supplier the book

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!

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