Question

You want to see if there is a statistical difference between the two groups. Run descriptives and a two-tailed, two sample assuming equal variance t-test.

Here's your data:

Weight of Apples in Grams | |||

Apple ID | Farm A | Farm B | |

1 | 131 | 151 | |

2 | 147 | 159 | |

3 | 134 | 162 | |

4 | 134 | 158 | |

5 | 136 | 159 | |

6 | 137 | 160 | |

7 | 140 | 150 | |

8 | 134 | 160 | |

9 | 136 | 160 | |

10 | 133 | 160 | |

11 | 134 | 160 | |

12 | 132 | 158 | |

13 | 139 | 162 | |

14 | 136 | 160 | |

15 | 135 | 154 | |

16 | 135 | 155 | |

17 | 135 | 159 | |

18 | 138 | 151 | |

19 | 134 | 151 | |

20 | 149 | 150 | |

21 | 149 | 155 | |

22 | 135 | 150 | |

23 | 148 | 150 | |

24 | 135 | 158 | |

25 | 149 | 152 | |

26 | 137 | 162 | |

27 | 134 | 158 | |

28 | 140 | 161 | |

29 | 138 | 160 | |

30 | 133 | 161 | |

31 | 140 | 158 | |

32 | 138 | 160 | |

33 | 150 | 149 | |

34 | 135 | 160 | |

35 | 136 | 160 | |

36 | 148 | 157 | |

37 | 150 | 152 | |

38 | 136 | 150 | |

39 | 142 | 157 | |

40 | 132 | 149 | |

41 | 133 | 160 | |

42 | 147 | 150 | |

43 | 135 | 159 | |

44 | 140 | 153 | |

45 | 132 | 151 | |

46 | 132 | 160 | |

47 | 136 | 151 | |

48 | 141 | 162 | |

49 | 136 | 162 | |

50 | 135 | 160 | |

51 | 142 | 160 | |

52 | 135 | 150 | |

53 | 132 | 158 | |

54 | 140 | 160 | |

55 | 136 | 152 | |

56 | 138 | 160 | |

57 | 132 | 159 | |

58 | 136 | 150 | |

59 | 136 | 161 | |

60 | 135 | 158 | |

61 | 135 | 152 | |

62 | 136 | 154 | |

63 | 137 | 151 | |

64 | 138 | 150 | |

65 | 137 | 150 | |

66 | 136 | 153 | |

67 | 134 | 153 | |

68 | 139 | 151 | |

69 | 133 | 151 | |

70 | 136 | 158 | |

71 | 149 | 158 | |

72 | 140 | 159 | |

73 | 135 | 160 | |

74 | 135 | 152 | |

75 | 131 | 153 | |

76 | 137 | 148 | |

77 | 139 | 157 | |

78 | 132 | 159 | |

79 | 138 | 160 | |

80 | 139 | 158 | |

81 | 148 | 150 | |

82 | 136 | 157 | |

83 | 133 | 152 | |

84 | 135 | 157 | |

85 | 149 | 158 | |

86 | 139 | 153 | |

87 | 137 | 161 | |

88 | 136 | 159 | |

89 | 135 | 151 | |

90 | 138 | 154 | |

91 | 134 | 152 | |

92 | 140 | 156 | |

93 | 135 | 150 | |

94 | 141 | 160 | |

95 | 142 | 150 | |

96 | 138 | 158 | |

97 | 132 | 160 | |

98 | 136 | 158 | |

99 | 141 | 150 | |

100 | 135 | 151 |

Answer #1

We can use here Excel directly .

Step 1 ) Enter data in Excel.

Step 2 ) Data >>Data analysis >> Select t-Test: Two-Sample Assuming Equal Variances>>Select two column data separately >> ok

t test statistic = -28.199

P value = 0 (approximately)

We reject H0.

115 124 132 134 136 137 138 138 139 140 141 141 144 144 145 145
145 146 146 148 150 150 150 151 151 151 151 154 154 156 156 156 156
157 158 159 159 159 159 160 161 161 161 161 162 162 163 164 164 164
164 165 165 165 166 166 166 166 168 168 168 168 168 168 169 169 169
169 170 170 171 171 172 173 173 173 173 173 174 174...

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Construct a
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Restaurant X
Restaurant Y
85
85
116
116
118
118
146
146
270
270
100
100
124
124
156
156
118
118
176
176
184
184
125
125
154
154
166
166
211
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127
128
132
136
137
139
140
141
143
146
148
148
148
151
152
155
157
158
162
168
The 5-number summary is _,_,_,_, and _, all in mBq

Refer to the accompanying data set of mean drive-through
service times at dinner in seconds at two fast-food restaurants.
Construct a
99% confidence interval estimate of the mean drive-through
service time for Restaurant X at dinner; then do the same for
Restaurant Y. Compare the results.
Service Times (seconds)
Restaurant X
Restaurant Y
80
80
124
124
118
118
147
147
264
264
102
102
127
127
155
155
112
112
174
174
183
183
119
119
149
149
164...

Refer to the accompanying data set of mean drive-through
service times at dinner in seconds at two fast food restaurants.
Construct a 95% confidence interval estimate of the mean
drive-through service time for Restaurant X at dinner; then do the
same for Restaurant Y. Compare the results.
Restaurant X
Restaurant Y
85
102
125
130
115
149
141
111
265
174
185
138
126
113
151
123
165
131
212
127
337
137
311
139
176
226
117
218
161...

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114
141
154 137
131 132 133
156 119
138
86 122
112
114 177 128
137 140
171
129 127
104
97 135 107
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92
182 150
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97 140
106 76
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119
125 162
80
138 124 132
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