Confidence interval for proportion-defective dolls

Assignment Help Basic Statistics
Reference no: EM13105213

A shipment of 500 dolls is received by Panda Importers. The quality control manager selects a random sample of 75 to test. Five are bound to be defective. Construct a 90 percent confidence interval for the population proportion of defective dolls in the shipment.

Ans should be
0.06666 + / - 1.645 sqrt (0.667 (1-0.667 / 75) sqrt (500-75 / 500 - 1)

How do I get these numbers?

Would it be reasonable to find 10 defective dolls?

Reference no: EM13105213

Questions Cloud

What is electric flux through one surface of icosahedron : An object with a charge of 0.980 µC is placed at the center of a regular icosahedron with 20 equivalent surfaces. What is the electric flux through one surface of the icosahedron?
How forensic psychology professional use results of study : Write brief summary of research study you selected. Ensure to include population studied, key data and results, and other significant takeaways of the article.
Knowledge about confidence interval for mean : Merrill Lynch Securities and Health Care Retirement, Inc., are two large employers in downtown Toledo, Ohio. They are considering jointly offering child care for their employees.
Determine the charge of the particle : A moving particle encounters an external electric field that decreases its kinetic energy from 8650 eV to 6910 eV as the particle moves from position A to position B. The electric potential at A is -56.5 V, and the electric potential at B is +28.1..
Confidence interval for proportion-defective dolls : A shipment of 500 dolls is received by Panda Importers. The quality control manager selects a random sample of 75 to test. Five are bound to be defective. Construct a 90 percent confidence interval for the population proportion of defective dolls ..
What is the electric field at x : Positive point charges q and 2q are located at x = 0 and x = 3d, respectively. What is the electric field at x = d (point P)? (Use any variable or symbol stated above along with the following as necessary: k for Coulomb constant.) magnitude E = di..
Confidence levels and margin of error : The mayor of a small town would like to know whether a local bond issue is likely to pass or not. He mails a survey to 500 randomly selected voters.
How large would the force be on an object : The number of electrons in a copper penny is approximately 10*10^23, How large would the force be on an object if it carried this charge and were repelled by an equal charge one meter away?
Evaluate the infrastructure of the target countries : Evaluate the infrastructure of the target countries like Japan and explain the ability of the country you have selected to distribute, promote and properly price the company's products.

Reviews

Write a Review

 

Basic Statistics Questions & Answers

  Marginal probability-conditional probability

If an apartment is selected at random, what is the probability that it is not a 2 bedroom apartment on the 2nd floor?

  Observed frequencies between variables

Using bar charts to compare observed frequencies between variables can be problematic when?

  Value of the sample test-statistic

Let p represent the population proportion of all numbers in the corporate file that have a first nonzero digit of 1. What is the value of the sample test statistic? (Round your answer to two decimal places.)

  Mean-standard deviation and z score

Stanford Binet IQ scores have a mean of 100 and a standard deviation of 15. Albert Einstein reportedly had an IQ of 160. Convert Einstein's IQ score to a z score.

  Calculations around break-even point

What is the break-even cost? What is the profit for 75 units of feed sold? How many units must be sold to produce a profit of $1020?

  Testing of regression coefficient

In a multiple regression equation two independent variables are considered, and the sample size is 25. The regression coefficients and the standard errors are as follows.

  Regression line-standard error of estimate

In the study of age and systolic blood pressure of five randomly selected subjects, a researcher reported the following data.

  Correct pair of hypotheses

An independent financial advisor claims an average rate of return, μ, on a particular investment is at least 7%. In testing her claim, the correct pair of hypotheses is:

  Provide a brief description of the main features

Provide a brief description of the main features of these data from the scatter plot and Describe why you would use performance as the predictor variable and performane related pay as the dependent variable in such a model.

  Normal probability-average cost of renting

The average cost of a renting a compact size car in a major metropolitan area is R51.74 with a standard deviation of 7.48. Assume a normal distribution.

  Claiming to accept an error rate

The average speed of greyhound dogs is about 18.8 meters per second. A particular greyhound breeder claims that her dogs are faster than the average greyhound. In a sample of 45 dogs, they ran, on average, 19.2 meters per second with a standard de..

  Distribution with approximately normal mean

Roger has read a report that the weights of adult mail Siberian tigers have a distribution which is approximately normal with mean μ = 390 lb and σ = 65 lb

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