(A)Is This Time Series Random? Perform a Runs Test and Compute

question 23

Essay

(A)Is this time series random? Perform a runs test and compute a few autocorrelations to support your answer.
(B)Does a linear trend appear to fit these data well? If so,estimate the linear-trend model for this time series,and interpret the value.
(C)Is there evidence of some seasonal pattern in these sales data? If so,characterize the seasonal pattern,and explain how to forecast future values.

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Definitions:

Haworth Structure

A method for representing the cyclic structure of monosaccharides with a simple three-dimensional perspective.

Positively Skewed

Refers to a distribution where the tail on the right side of the histogram is longer or fatter than the left side, indicating that data have a majority of their observations on the lower end.

Statistics Exams

Tests designed to evaluate knowledge and understanding of statistical theories, methods, and practices.

Test Period

A specific duration of time designated for the purpose of conducting tests, assessments, or experiments to evaluate performance, effectiveness, or reliability.