Estimate of the standard error of the difference of means

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1. Assume that you are working with the results of a research based on 25 participants. The mean difference (Dbar) is 9.72, with an estimate of the standard error of the mean difference sDbar = 6.33. Set your level of significance at .05.

  • Formulate an appropriate null hypothesis and calculate t.
  • Identify the critical value and state your conclusion.

2. Consider a research project involving two independent samples: Sample A and Sample B:

Mean of Sample A = 30.45, n = 25

Mean of Sample B = 26.54, n =27

Estimate of the standard error of the difference of means sxbar1-xbar2 = 2.15. Set your level of significance at .05.

Formulate an appropriate null hypothesis and calculate t statistic.

Identify the critical value and state your conclusion

Reference no: EM132465264

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