Is p value005 No Do not reject null Reject null hypothesis Yes Examples Disney

Is p value005 no do not reject null reject null

This preview shows page 5 - 9 out of 22 pages.

5. Is p-value<0.05?NoDo not reject null
Image of page 5
Image of page 6
7Example 2. Paired SamplesIs there a difference in the mean preference before and after visiting the Disney theme park? The difference in these cases is examined by a paired samples t test. To compute t for paired samples, the paired difference variable, denoted by D, is formed and its mean and variance is calculated. 0:0DH(People have the same mean preference before and after visiting Disney park)1:0DH(People have different mean preferences before and after visiting Disney park)20SPSS: Paired-Samples T TestAnalyze => Compare Means => PairedSamples T TestSelect paired variables (pref_after and pref_before)21SPSS: Output22Reject the H0of equal means (P value < 0.05)Conclusion:people have different preference after visiting park thanbefore visiting
Image of page 7
8Interpreting the results of a paired-samples t testNull hypothesis (H0): the average population value of two variables are the sameIf you fail to reject the null hypothesis, then conclude by re-stating the null hypothesis => StopExample: people have the same preference after visiting park as before visiting--If H0is rejected, then the average value is notthe same for the two variables. State which variable is higherExample: people have higherpreference after visiting park than before visiting23Example 3. Two Independent Samples
Image of page 8
Image of page 9

You've reached the end of your free preview.

Want to read all 22 pages?

  • Two '16
  • Statistics, Null hypothesis, Statistical hypothesis testing, Statistical tests, Student's t-test

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture