The following table shows the average life of electric bulbs manufactured by X and Y companies: Compa n y X Company Y No. bulbs n 100 100 Mean life…
BBA Business Statistics · 2023 · Solved Question with Answer
The following table shows the average life of electric bulbs manufactured by X and Y companies:
| Company X | Company Y | |
| No. bulbs n | 100 | 100 |
| Mean life in hours | 1300 | 1250 |
| Standard deviation | 80 | 90 |
Test whether there is any significant difference in mean life of the electric bulbs produced by two companies at 5% level significance.