Exhibit 12

question 61

Multiple Choice

Exhibit 12.7 The heights (in cm) for a random sample of 60 males were measured.The sample mean is 166.55,the standard deviation is 12.57,the sample kurtosis is 0.12,and the sample skewness is -0.23.The following table shows the heights subdivided into non-overlapping intervals. Refer to Exhibit 12.7.The heights are subdivided into five intervals.The degrees of freedom for the goodness-of-fit test for normality is:

• A)2
• B)3
• C)4

---

Definitions:

Double Exponential Smoothing

A forecasting method that applies exponential smoothing twice, useful in capturing trends and seasonality in data.

Exponential Smoothing Model

A forecasting technique that applies decreasing weights to past observations as they recede into the past.

Level Significance

The probability of rejecting the null hypothesis in a statistical test when it is actually true, typically denoted as alpha (α).