Reference no: EM13577484
Please help - An aircraft manufacturing company is designing a new passenger seat.
An aircraft manufacturing company is designing a new passenger seat. Currently three models have been produced. The company wishes to know which is the best model to adopt for the aircraft based on the following variables:
- safety
- comfort
- durability
- life-cycle cost
The company wishes to use "hard" data from tests and "soft" data from surveys.
1. A wear test was conducted on samples of fabric used to cover the model seats in order to simulate passengers sitting down, getting up and sliding around. For model A, 30 samples were tested. The wear out times in hours were:
3.1, 3.7, 3.2, 4.0, 3.1, 4.1, 3.7, 3.8, 3.7, 3.4, 3.5, 3.7, 3.9, 3.2, 3.7, 3.6, 3.8, 3.5, 3.7, 3.6, 4.1, 3.3, 3.2, 3.8, 3.8, 3.5, 3.8, 4.0, 3.9, 3.8
A. Construct an ungrouped frequency distribution.
B. Add a column to A for the relative frequency.
C. Add another column showing the cumulative frequency.
D. Construct a frequency distribution of 4 groups of equal width.
E. Identify the upper and lower bounds of each of the 4 groups.
F. Identify the class mark of each of the groups.
G. Construct a histogram for the grouped distribution.