Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Describe 90% confidence interval for the true proportion.

1. As a help to the establishment of personnel requirements the director of a hospital wishes to estimate the mean number of people who are admitted to the emergency room during a 24-hour period. The director arbitrarily selects 64 different 24-hour periods as well as determines the number of admissions for each. For this sample = 19.8 and s2 = 25. Using the sample standard deviation as an approximate for the population standard deviation what size sample should the director choose if she wishes to estimate the mean number of admissions per 24-hour period to within 1 admission with 99% reliability?

2. A university dean is attentive in determining the proportion of students who receive some sort of financial help. Rather than study the records for all students the dean randomly selects 200 students and finds that 118 of them are receiving financial aid. Use a 90% confidence interval to approximate the true proportion of students who receive financial aid.

3. An economist is attentive in studying the incomes of consumers in a particular region. The population standard deviation is known to be $1000. A random sample of 50 individuals caused in an average income of $15,000. describe what total sample size would the economist want to use for a 95% confidence interval if the width of the interval must not be more than $100?

a)  n = 1537

b)  n = 385

c)  n = 40

d)  n = 20

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M923374

Have any Question? 


Related Questions in Statistics and Probability

How do you interpret the p-values in a regression output

How do you interpret the p-values in a regression output? What does a p-value of .0495 mean? What significance level is this?

Find the indicated area under the standard normal curve to

Find the indicated area under the standard normal curve. To the left of z= - 1.96 The area to the left of z = -1.96 under the standard normal curve is __.(Round to four decimal places as needed.)

Statistics assignmentquestions address all of the following

Statistics Assignment Questions: Address all of the following questions in a brief but thorough manner. • What are the most common measures of central tendency? Include brief definitions for the common measures of centra ...

You are an economic consultant whose task is to investigate

You are an economic consultant whose task is to investigate whether there is gender discrimination with respect to earnings in the government of Little Rock. You take a random sample of 22 people of which 10 are women an ...

One thousand people are enrolled in a 10 year cohort study

One thousand people are enrolled in a 10 year cohort study. At the start of the study, 100 have diagnosed CVD. Over the course of the study, 80 people who were free of CVD at baseline develop CVD. What is the cumulative ...

A researcher would like to study bmi levels in adults 20-40

A researcher would like to study BMI levels in adults 20-40 years of age. She selected 9 patients and found their BMI values to be: 38, 19, 25, 26, 29, 18, 34, 32, 30 The mean BMI level of this group of patients is 25.8 ...

Case study mikhail gorbachevs 1988 un speechif the pace of

Case Study: Mikhail Gorbachev's 1988 UN SpeechIf the pace of improving US-Soviet relations seemed rapid, Mikhail Gorbachev's speech to the United Nations General Assembly would shift the process into overdrive.  In this ...

1 the correlation between self-esteem and shyness is -50

1. The correlation between self-esteem and shyness is -.50. Interpret this correlation. 2. Which is larger-a correlation of +.45 or a correlation of -.60? Explain.

An auditor claims that the average annual salary of a

An auditor claims that the average annual salary of a project manager at a construction company exceeds $82,000. A random sample of 20 project managers had an average salary of $89,600 with a sample standard deviation of ...

Explain how you would conduct the study you designed in

Explain how you would conduct the study you designed in Question as a matched-subjects design. Question:- Design a randomized groups experiment to test the hypothesis that children who watch an hour-long violent televisi ...

  • 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

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

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