1. Topic: Restaurant Tipping Presented by: Miranda Lazar & Kristyn Kelly

6. Men

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

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