My Math Forum  

Go Back   My Math Forum > College Math Forum > Advanced Statistics

Advanced Statistics Advanced Probability and Statistics Math Forum

LinkBack Thread Tools Display Modes
April 14th, 2010, 10:45 AM   #1
Joined: Feb 2010

Posts: 2
Thanks: 0

Hypthesis testing - t-test statistic


I am working on the question below and I believe that it is necessary to apply the t-test since the sigma is not known. However, I would need the sample standard deviation to apply the t-test and I don't quite understand how I should calculate it or extract it out of the given information.

For drivers in the 20-24 age bracket, there is a 34% rate of car accidents in one year (based on data from the National Safety Council). An insurance investigator finds that in a group of 500 randomly selected drivers aged 20-24 living in New York City. 40% had accidents in the last year.
- If the 34% rate is correct, estimate the probability that in a group of 500 randomly selected drivers, at least 40% had accidents in the last year.
- Based on your finding in (a), is there strong evidence supporting the claim that the accident rate in the 20-24 age bracket in New York City is higher than 34%? Explain.

Helpful for any hints and suggestions!
Anne1010 is offline  

  My Math Forum > College Math Forum > Advanced Statistics

hypthesis, statistic, testing, ttest

Search tags for this page
Click on a term to search for related topics.
Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Statistic Hypothesis Testing Energy Company? gigsaw Advanced Statistics 0 March 30th, 2012 09:52 PM
Statistic help!! Alexis87 Algebra 3 September 13th, 2011 09:47 PM
simple statistic : Hypothesis test naspek Advanced Statistics 0 February 19th, 2010 06:37 PM
Test Statistic for Paired Sample Test semifold Advanced Statistics 0 January 23rd, 2010 02:17 PM
Find critical value, F-test value and Test Null Hyp. symmetry Advanced Statistics 0 April 7th, 2007 03:05 AM

Copyright © 2019 My Math Forum. All rights reserved.