1 STAT 301 REVIEW FOR FINAL ANSWERS 1 F 2 B 3 C 4 I 5 L 6 J 7 G 8 K 9 D 10 E 11 D 12 B 13 A 14 A 15 C 16 a b c d e f g h Degree Days Gas Consumption Linear strong positive y 0 212 x 1 094 7 5812 0 4188 98 3 H0 1 0 Ha 1 0 t 19 959 17 a b c d e f g h P value 0 Reject H 0 there is a linear relationship between degree days and gas consumption in the population Attendance at game Points Purdue scored Linear weak negative y 0 000397 x 55 233 32 8422 1 8422 37 3 H0 1 0 Ha 1 0 t 2 783 P value 0 016 2 0 008 Reject H 0 there is a negative association between attendance and points scored in the population 2 0 000397 attendance 55 233 18 a y 2 b R does not decrease significantly when points opponents scored is removed from the model The t test for points opponents scored is not significant and the test statistic for attendance is significant Standard deviation is better when points opponents scored is removed from the model Only the scatterplot for attendance at game and points Purdue scored shows a reasonable linear relationship 19 a H 0 png pg versus H a png pg b Z 1 906 c 0 0281 d Reject H 0 there is enough evidence to show that the population proportion of microbe growth is significantly higher for bare hands restaurant tortillas than for glove wearing restaurant tortillas 20 0 1566 0 19996 this is reasonable because np 15 and n 1 p 15 21 a 0 854 b 0 232 c 01 10 11 99 1 0 None 168 361 199 272 d H 0 There is no relationship between alcohol consumption and smoking during pregnancy in the population H a There is a relationship between alcohol consumption and smoking during pregnancy in the population 2 42 252 P value 0 e f Reject H 0 there is enough evidence to conclude that there is a relationship between alcohol consumption and smoking during pregnancy in the population g Yes no more than 20 of the cells have expected counts less than five and none of them have expected counts less than one 22 B 23 E 24 A 25 A 26 B 27 C 28 D 29 C 30 A 31 B 32 C 33 F 3 34 G 35 E 36 L 37 D 38 K 39 B 40 J 41 I 42 a H 0 p 0 72 H a p 0 72 b 0 945 c 0 1711 or 0 1736 depending on rounding of test statistic d Fail to reject the null there is not enough evidence to show that the percentage of engineering students who push the snooze button is more than 72 e 0 6836 0 8764 f 43 a 0 4447 conditional probability b H 0 There is no relationship between smoking and drinking in the population H a There is a relationship between smoking and drinking in the population 2 12 845 P value 0 170 Fail to reject the null there is not enough evidence to show a relationship between smoking and drinking in the population c Yes because no more than 20 of the cells have expected counts less than 5 and none of them have counts less than one
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