Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

describe Confidence interval for the true proportion.

1. A quality control engineer is attentive in the mean length of sheet insulation being cut automatically by machine. The wanted length of the insulation is 12 feet. It is known that the standard deviation in the cutting length is 0.15 feet.  A sample of 70 cut sheets produces a mean length of 12.14 feet. This sample will be utilized to obtain a 99% confidence interval for the mean length cut by machine.

a. The critical value to use in procurement the confidence interval is _______________

b. The confidence interval goes from ________ to ________.

c. Presume the engineer had decided to estimate the mean length to within 0.03 with 99% confidence. Then the sample size would be ________.

2. The president of a university is worried that the percentage of students who have cheated on an exam is higher than the 1% acceptable level.  A confidential arbitrary sample of 1000 students from a population of 7000 revealed that 6 of them said that they had cheated on an exam during the last semester.

a. describe what is the critical value for the 90% one-sided confidence interval for the proportion of students who had cheated on an exam during the last 12 months?

b. describe what is the upper bound of the 90% one-sided confidence interval for the proportion of students who had cheated on an exam during the last 12 months?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M923375

Have any Question? 


Related Questions in Statistics and Probability

1 how do quasi-experimental designs differ from true

1. How do quasi-experimental designs differ from true experiments? 2. Under what circumstances would a researcher use a quasi-experimental rather than an experimental design?

Corrections for phase 4in confidence interval calculations

CORRECTIONS FOR PHASE 4 In confidence interval calculations, sqrt(364) goes in the bottom for E; this has thrown off your intervals - too narrow; t should be negative in the hypothesis test, but your conclusion is correc ...

Let x0 x1 x2nbspbe three vectors in rn prove that these

Let x 0 , x 1 , x 2  be three vectors in R n . Prove that these vectors are affine independent if and only if none of them is a convex combination of the other two.

1 what are the advantages and disadvantages of using

1. What are the advantages and disadvantages of using narrative records in observational research? 2. Distinguish between a structured and unstructured observation method. 3. Distinguish between checklists and observatio ...

Suppose you have a stock portfolio where 28 of the stocks

Suppose you have a stock portfolio where 28% of the stocks earned a return of 12.2%, 12% earned a return of 15.1%, 24% of the stocks earned a return of 0%, 18% of the stocks earned a return of -1.5%, and 18% of the firms ...

A car dealership has 6red12silver and 5black cars on the

A car dealership has 6red,12silver, and 5black cars on the lot. Ten cars are randomly chosen to be displayed in front of the dealership. Complete parts (a) through (c) below. (a) Find the probability that 4 cars are red ...

Discuss the changes to european imperialism between the

Discuss the changes to European imperialism between the World Wars.

Question please show your work by making a table fornbspd

Question: (Please show your work by making a table for  d and d-square) A motivational program was designed to increase the number of hours each student who took it studied per week. Eight randomly selected students were ...

Please explain every step to make the sum understandableit

Please explain every step to make the sum understandable. It has been hypothesized that the distribution of seasonal colds in Canada is as follows: Season          Percentage Fall                    35% Winter            ...

The time it takes to complete a standardized exam is

The time it takes to complete a standardized exam is normally distributed with a mean of 70 minutes and a standard deviation of 10 minutes. How much time should be allowed for the exam so that 80% of the students will fi ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen