Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Select the right sample size for a simple random sample.

The travel-5 largest cities in the United States are reported in the 2003 Information Please Almanac. Presume that a preliminary simple random sample of residents of San Francisco is used to develop a planning value of 6.25 minutes for the population standard deviation.

a) If we need to estimate the populations mean travel-to-work time for San Francisco residents with a margin of error of 2 minutes what sample size must be used? Assume 95% confidence.

b) If we need to estimate the populations mean travel-to-work time San Francisco residents with a margin of error of 1 minute what sample size should be used? Presume 95% confidence.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M923378

Have any Question? 


Related Questions in Statistics and Probability

A committee comprised of 15 members is called upon to

A committee comprised of 15 members is called upon to choose the prettiest color: red, blue, or yellow. The committee members simultaneously announce their strict preference relations among these three colors. If red is ...

The population of lengths of aluminum-coated steel sheets

The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.3 inches. What is the probability that average length of a steel sheet from a sa ...

1 one factor in determining the shelf life of a dry cereal

1) One factor in determining the shelf life of a dry cereal is the moisture content.  Since standard packaging techniques do not completely prevent cereal from absorbing moisture, the longer it stays on the shelf, the mo ...

Consumer reports provided extensive testing and ratings for

Consumer Reports provided extensive testing and ratings for more than 100 HDTVs. An overall score, based primarily on picture quality, was developed for each model. In general, a higher overall score indicates better per ...

In an investigation of environmental causes of disease data

In an investigation of environmental causes of disease, data were collected on the annual mortality rate ( deaths per 100,0000) for males in 61 large towns in England and Wales. In addition, the water hardness was record ...

Suppose a researcher believes that college faculty vote at

Suppose a researcher believes that college faculty vote at a lower rate than college students. She collects data from 200 college faculty and 200 college students using simple random sampling. If 120 of the faculty and 1 ...

For this assignment you will continue to use data derived

For this assignment you will continue to use data derived from Capital Bikeshare trip records from 2011 and 2012, this time analysing patterns in daily numbers of rentals by casual users. References and Data Sources: Bac ...

1 what are the most important threats to validity that

1. What are the most important threats to validity that occur in quasi experimental research designs when the research is conducted over a period of time? What techniques can be used to minimize these potential interpret ...

1 what is validity2 distinguish between face validity

1. What is validity? 2. Distinguish between face validity, construct validity, and criterion-related validity. In general, which kind of validity is least important to researchers? 3. Can a measurement procedure be valid ...

Assume the random variable x is normally distributed with

Assume the random variable x is normally distributed with mean mu = 85 and standard deviation sigma =4. Find the indicated probability. P(x

  • 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