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 Advanced Statistics Advanced Probability and Statistics Math Forum

 January 23rd, 2010, 02:17 PM #1 Newbie   Joined: Jan 2010 Posts: 1 Thanks: 0 Test Statistic for Paired Sample Test In this problem I am comparing two brands of golf balls using an automated machine so all variables are identical in both tests except for the brand. A random sample of each brand was taken: Brand A: 234, 236, 230, 227, 234, 233, 228, 229, 230, 238 Brand B: 240, 236, 241, 236, 239, 243, 230, 239, 243, 240 I am trying to find "The test statistic for testing whether the two population means are equal." I am using this equation: tstat = (dbar) - (?d)/((sd/(sqrt(n)) Where dbar = mean paired difference = -6.8 ?d = hypothesized population mean paired difference = 0 sd = sample standard deviation for paired differences = 4.442 n = number of paired values in sample = 10 I am getting tstat = -4.84 Unfortunately, this is a multiple choice problem and my possible answers are: 1. F = 1.115 2. t = 1.96 3. t = -4.04 4. t = -2.58 Any ideas what I am doing wrong? Thank you for your help. Tags paired, sample, statistic, test Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post Anne1010 Advanced Statistics 0 April 14th, 2010 10:45 AM naspek Advanced Statistics 0 February 19th, 2010 06:37 PM GiliSu Advanced Statistics 0 October 2nd, 2009 04:08 PM johndeere19 Advanced Statistics 1 July 1st, 2009 11:34 AM symmetry Advanced Statistics 0 April 7th, 2007 03:05 AM

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