The number of haircuts performed each day at KwikKuts in the last four weeks is listed below. 
a. Plot the sales data. Do you see both trend and seasonality components in the data?
b. Forecast the number of haircuts to be performed in each workday of week 6.
Definitions:
Degrees of Freedom
Degrees of freedom in statistics signify the number of values in a calculation that are free to vary without violating any imposed constraints.
Cp
Cp, or process capability index, is a statistical measurement of a process's ability to produce output within specified limits.
Fully Specified
In the context of models or systems, it refers to having all necessary parameters and conditions clearly defined and detailed.
Multiple Regression Model
A Multiple Regression Model is a statistical method used to predict the value of a dependent variable based on the values of two or more independent variables, assessing the extent of their impact.
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