As a small restaurant owner, you are very interested in
understanding the demand of your different products. You have been
collecting data over the past 11 weeks on the number of fish
platter sales that you make each day.
You want to run a simulation and you believe that 60% of your fish
platter sales for a given week show up on the weekends (evenly
split between Friday, Saturday and Sunday) while the remaining 40%
are evenly divided across the four other weekdays (Monday, Tuesday,
Wednesday and Thursday).
Your recorded data over the past 11 weeks is below. Use the average
demand for each day (Monday to Sunday) to test your assumption
about the daily distribution of fish platter sales.
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|
What is the P-Value of your Chi-Squared test?
| observed | expected | O - E | (O - E)² / E | |
| Monday | 13.09090909 | 9.618 | 3.473 | 1.254 |
| Tuesday | 14.09090909 | 9.618 | 4.473 | 2.080 |
| Wednesday | 13.81818182 | 9.618 | 4.200 | 1.834 |
| Thursday | 13.27272727 | 9.618 | 3.655 | 1.389 |
| Friday | 13.36363636 | 19.236 | -5.873 | 1.793 |
| Saturday | 14.90909091 | 19.236 | -4.327 | 0.973 |
| Sunday | 13.63636364 | 19.236 | -5.600 | 1.630 |
| 96.18181818 | 96.182 | 0.000 | 10.953 | |
| 10.95 | chi-square | |||
| 6 | df | |||
| .0898 | p-value |
The p-value is 0.0898.
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