User Account

All Pages

What is the probability that the mean price for a sample of

Assignment Help Basic Statistics
Reference no: EM13577267

Question 1: The average price of a gallon of unleaded regular gasoline was reported to be $3.13 in Illinois. Use this price as the population mean, and assume the population standard deviation is $.20.

a. What is the probability that the mean price for a sample of 30 service stations is within $.03 of the population mean?

b. What is the probability that the mean price for a sample of 50 service stations is within $.03 of the population mean?

c. What is the probability that the mean price for a sample of 100 service stations is within $.03 of the population mean?

d. Which, if any of the sample sixes in parts (a),(b),(c) would you recommend to have at least a .95 probability that the sample mean is within $.03 of the population mean?

Question 2: Times/CNN voter polls monitor public opinion for the presidential candidates during 2000 presidential election campaign. One Time/CNN poll conducted by Yankelovich Partners Inc, used a sample of 589 likely voters. Assume the population proportion for a presidential candidate is p=.50. Let p be the sample proportion likely voters favoring the presidential candidate.

a. Show the sampling distribution of p

b. What is the probability the Times/CNN poll will provide a sample proportion within +-.04 of the population proportion?

c. What is the probability the Times/CNN poll will provide a sample proportion within +-.03 of the population proportion?

d. What is the probability the Times/CNN poll will provide a sample proportion within +-.02 of the population proportion?

Question 3: The national Center for Education Statistics reported that 47% of college students work to pay for tuition and living expenses. Assume that a sample of 450 college students was used in the study.

a. Provide a 95% confidence interval for the population proportion of college students who work to pay for tuition and living expenses.

b. Provide a 99% confidence interval for the population proportion of college students who work to pay for tuition and living expenses.

c. What happens to the margin of error as the confidence is increased from 95% to 99%

Reference no: EM13577267

Questions Cloud

The perfect tool company produced 80000 saw blades during : the perfect tool company produced 80000 saw blades during the year. it took 1.5 hours of labor per blade at a rate of
Aresearcher obtains an f-ratio with df 2 36 from an : a researcher obtains an f-ratio with df 2 36 from an independent-measures research study. what is the total number of
Prepare summary journal entries to record the months sales : selected balance sheet information for the wolf company at november 30 and december 31 2013 is presented below. the
Alameda service center just purchased an automobile hoist : alameda service center just purchased an automobile hoist for 15300. the hoist has a 5-year life and an estimated
What is the probability that the mean price for a sample of : question 1 the average price of a gallon of unleaded regular gasoline was reported to be 3.13 in illinois. use this
For repeated random samples of three bottles what is the : you select 3 bottles at random from a large production batch of bottled water. you guess that 80 of the bottles in the
A new grug had a potency advertised at 75 given the : a new grug had a potency advertised at 75. given the following smaple datan25x bar 76.6s1a check manufacturers claim
Krammer company has liabilities equal to one fourth of the : krammer company has liabilities equal to one fourth of the total assets. krammers owners equity is 45000. using the
Bob johnson is the sole owner of johnsons carpet cleaning : 1. bob johnson is the sole owner of johnsons carpet cleaning service. bob purchased a personal automobile for 10000

Reviews

Write a Review

Basic Statistics Questions & Answers

  Probability requirement of binomial distribution

Each of four tasters picks one coffee anyway (not knowing which is which, because the coffee is in identical cups). What is the probability that a) All four tasters choose Tasty Bean?

  Find confidence interval for true mean daily wage of workers

A random sample of 100 workers in this industry has a mean daily wage of $124. Find a 95% confidence interval for the true mean daily wage of all union workers in the industry.

  Probability for the given set of information

what are the probability of you having the disease?

  First order linear differential equations

To begin with, I have an example problem that asks to find a complete solution for: y'+ 2xy = x. The text says to multiply both sides by e^int a(x) dx

  Question 1 over 90 of the nations school districts

question 1 over 90 of the nations school districts according to a recent research published in the journal of education

  Interpretation of error term and goodness of fit regression

Consider the following estimated regression equation, based on 10 observations.

  Calculate using megastat package will contain more ounces

Assuming the weight of cereal is normally distributed, determine the likelihood that a package will contain more than 12.2 ounces. Calculate using megastat.

  What are the implications of type one error for traffic flow

Set up the null and alternative hypotheses to see if the data show that it does indeed take seniors longer than 15 seconds to cross the street. In terms of traffic flow, what are the implications of a Type I error?

  Value of the critical value

Given the hypothesis Ho: u=400, you conduct a sample of 12 observations and obtain a sample mean of 407 and a sample standard deviation of 6. Using a .01 significance level to test to see if you would reject Ho, what would be the value of your cri..

  Hypothesis null and hypothesis alternate statement for anova

Provide a summary of the research article. Include a hypothesis null and hypothesis alternate statement for an ANOVA process. Identify a data set that can be used for your ANOVA process.

  Year-end to arrive at the warranty expense accrual for cars

In the past, Bly has tended to estimate warranty expenses on the high end to be conservative. He must work with the dealership's accountant at year-end to arrive at the warranty expense accrual for cars sold each year.

  Prediction interval based on multiple-regression equation

Construct a 98% prediction interval for the selling price of a 4l- year old house having 4500 square feet, 13 rooms, and an attached garage.

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

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