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Jose, a competitor in cup stacking, has a sample stacking time mean of 7.5 seconds from 13 trials. Jose still claims that his average stacking

Jose, a competitor in cup stacking, has a sample stacking time mean of 7.5 seconds from 13 trials. Jose still claims that his average stacking time is 8.5 seconds, and the low average can be attributed to chance. At the 2% significance level, does the data provide sufficient evidence to conclude that Jose's mean stacking time is less than 8.5 seconds? Given the sample data below, accept or reject the hypothesis.

  • H0:=8.5seconds; Ha:<8.5seconds
  • =0.02 (significance level)
  • z0=2.18
  • p=0.0146

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