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Comparing means across three or more groups.

Business planning requires looking into the future. Time series analysis helps identify trends, seasonal patterns, and cyclical fluctuations. Techniques Smoothing out short-term fluctuations. Exponential Smoothing: Weighting recent data more heavily. ba4101 statistics for management notes pdf

Why large samples tend to follow a normal distribution. Comparing means across three or more groups

You cannot survey every customer, so you must use sampling. This section covers how to ensure your small group accurately represents the whole. Core Topics Random, stratified, and cluster sampling. ba4101 statistics for management notes pdf

Memorize the conditions for using a Z-test vs. a T-test (Sample size > 30).

Drawing conclusions about a population based on a sample.