IASSC Certified Lean Six Sigma Black Belt (ICBB) — Question 1

Sally and Sara sell flower pots at their garage sale. Sally motivates Sara mentioning that they will sell a minimum of 15 pots per day if the outside temperature exceeds 60o F. From a sample, whose population is assumed to follow a Normal Distribution, taken for 30 days at 60 degrees or more an average of 13.6 pots per day were sold with a Standard Deviation of 0.7 pots. The statistical Degrees of Freedom for this example are?

Answer options

• A. 1
• B. 29
• C. 30
• D. 31
• E. 2

Correct answer: B

Explanation

The Degrees of Freedom in this case is calculated as the sample size minus one, which is 30 - 1 = 29. Therefore, option B is correct. The other options are incorrect because they do not follow the formula for calculating Degrees of Freedom in this statistical context.