MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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You wish to test the following claim (Ha) at a significance level of α=0.005.

      Ho:μ1=μ2
      Ha:μ1>μ2

You obtain a sample of size n1=21 with a mean of M1=84.6 and a standard deviation of SD1=20.3 from the first population. You obtain a sample of size n2=27 with a mean of M2=82.1 and a standard deviation of SD2=11.5

from the second population.  Use the Theory-based inference applet to conduct the test of significance.

(a)  What is the t-score for this sample?
      t-score =   (Round to 2 decimal places.

(b)  What is the p-value for this sample?
      p-value =   (Round to 4 decimal places.)

(c)  The p-value is...

  • less than (or equal to) α
  •  
  • greater than α
  •  

 

(d)  This p-value leads to a decision to...

  • strong evidence in support of alternative
  • accept the null
  • null is plausible

 

(e)  As such, the final conclusion is that...

  • We conclude that μ1>μ2
  • .
  • We conclude that μ1=μ2
  • .
  • We have statistically significant evidence to support the claim that μ1>μ2
  • ..
  • It is plausible that μ1=μ2

.

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