Textbook ExpertVerified Tutor
20 Dec 2021
Given information
According to one airline, its flights are always on time, with an average delay of no more than 15 minutes. The average delay, it maintains, is so consistent that the variance is less than 150 minutes. A unhappy traveller calculates the delays for his following 25 flights, doubting the claim's consistency. With a standard deviation of 15 minutes, the average delay for those 25 flights is 22 minutes.
Step-by-step explanation
Step 1.
The square of the sample standard deviation is the sample variance.
Therefore, the sample variance:
Conclusion:
The Sample Variance was discovered to be 
.
Unlock all Textbook Solutions
Already have an account? Log in
Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208
Solutions
Chapter
Section
- Problem 69
- Problem 70
- Problem 71
- Problem 72
- Problem 73
- Problem 74
- Problem 75
- Problem 76
- Problem 77
- Problem 78
- Problem 79
- Problem 80
- Problem 81
- Problem 82
- Problem 83
- Problem 84
- Problem 85
- Problem 86
- Problem 87
- Problem 88
- Problem 89
- Problem 90
- Problem 91
- Problem 92
- Problem 93
- Problem 94
- Problem 95
- Problem 96
- Problem 97
- Problem 98
- Problem 99
- Problem 100
- Problem 101
- Problem 102
- Problem 103
- Problem 104
- Problem 105
- Problem 106
- Problem 107
- Problem 108
- Problem 109
- Problem 110
- Problem 111
- Problem 112
- Problem 113
- Problem 114
- Problem 115
- Problem 116
- Problem 117
- Problem 118
- Problem 119
- Problem 120
- Problem 121
- Problem 122
- Problem 123
- Problem 124
- Problem 125
- Problem 126
- Problem 127
- Problem 128
- Problem 129