Trying to predict weekly sales with a standard error of estimate of $1,955,we would conclude that 68 percent of the predictions would not be off more than $1,955,95 percent would not be off by more $3,910,and 99.7 percent would not be off by more than $5,865.

Question

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The standard error of estimate follows a normal distribution, where approximately 68% of values lie within ±1 standard deviation, 95% within ±2, and 99.7% within ±3. The given values align with these percentages.

Trying to Predict Weekly Sales with a Standard Error of Estimate