How Do You Determine Whether to Use the Z or T

question 162

Essay

How do you determine whether to use the z or t distribution in computing the margin of error, $E = z \alpha / 2 \cdot \frac { \sigma } { \sqrt { n } } \text { or } E = t _ { \alpha / 2 } \cdot \frac { s } { \sqrt { n } } ?$

Apply the Miller-Orr model to find the optimal cash balance limit for a firm.

Calculate the net present value (NPV) of adopting a lockbox system for cash collections.

Understand and calculate the amount of average daily receipts from customers.

Grasp the concept of collection time and its impact on firm's cash flow.