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Topic: Restaurant Tipping Presented by: Miranda Lazar & Kristyn Kelly
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Men
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SAMPLE HYPOTHESIS TESTS hyp value sample mean stdev sample size for the mean REF  =average() =stdev() =(n) NULL :  Null statement   ALTERNATIVE:  Alternative statement test statistic (obs) =standardize(sample mean, ref value, std error(stdev/sqrt(n))  critical measure =normsinv(1-signif level/#tails) one-tailed or two-tailed? 1 |OBS| > CRIT? p-value =(#tails)*(normsidst(abs(obs)))  -level 0.050  p-value <   -level?
HYPOTHESIS TESTS hypothesized value sample mean stdev sample size for the mean 3.00  3.09  1.49  157 NULL :  Men are better tippers than women   ALTERNATIVE:  Men are not better tippers than women test statistic (obs) .7540843 critical measure 1.6448535  one-tailed or two-tailed? 1 |OBS| > CRIT? no p-value 0.225   -level 0.050  p-value <   -level? no ACCEPT THE NULL
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HYPOTHESIS TESTS hypothesized value sample mean stdev sample size for the mean 3.00  3.10  1.44  176 NULL :  people tip more than the average tip at dinner time ALTERNATIVE:  people tip less than the average tip at dinner time   test statistic (obs) 0.94836  critical measure 1.64485  one-tailed or two-tailed? 1 |OBS| > CRIT? no p-value 0.171   -level 0.050  p-value <   -level? no ACCEPT THE NULL
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MBA 512 Tips

  • 1. Topic: Restaurant Tipping Presented by: Miranda Lazar & Kristyn Kelly
  • 2.
  • 3.
  • 4.
  • 5.
  • 6. Men
  • 7.
  • 8. SAMPLE HYPOTHESIS TESTS hyp value sample mean stdev sample size for the mean REF =average() =stdev() =(n) NULL :  Null statement   ALTERNATIVE:  Alternative statement test statistic (obs) =standardize(sample mean, ref value, std error(stdev/sqrt(n)) critical measure =normsinv(1-signif level/#tails) one-tailed or two-tailed? 1 |OBS| > CRIT? p-value =(#tails)*(normsidst(abs(obs)))  -level 0.050 p-value <  -level?
  • 9. HYPOTHESIS TESTS hypothesized value sample mean stdev sample size for the mean 3.00 3.09 1.49 157 NULL :  Men are better tippers than women   ALTERNATIVE:  Men are not better tippers than women test statistic (obs) .7540843 critical measure 1.6448535 one-tailed or two-tailed? 1 |OBS| > CRIT? no p-value 0.225  -level 0.050 p-value <  -level? no ACCEPT THE NULL
  • 10.
  • 11.  
  • 12. HYPOTHESIS TESTS hypothesized value sample mean stdev sample size for the mean 3.00 3.10 1.44 176 NULL :  people tip more than the average tip at dinner time ALTERNATIVE:  people tip less than the average tip at dinner time   test statistic (obs) 0.94836 critical measure 1.64485 one-tailed or two-tailed? 1 |OBS| > CRIT? no p-value 0.171  -level 0.050 p-value <  -level? no ACCEPT THE NULL
  • 13.
  • 14.  
  • 15.  
  • 16.  
  • 17.  
  • 18.
  • 19.
  • 20.