A Sample of 13 College Professors Has a Mean Age

question 4

Essay

A sample of 13 college professors has a mean age of 30 years and a standard deviation of 5 years.Suppose that the sample is enlarged to 15 college professors,by including two additional professors that are each 30 years old.Will the standard deviation increase,decrease,or stay the same,and why?

---

Definitions:

Allowance Account

An accounting reserve set up to account for future adjustments such as bad debts or product returns.

Direct Write-off Method

An accounting method where uncollectible accounts receivable are directly written off against income at the time they are deemed non-collectable.

Allowance for Doubtful Accounts

An accounting provision representing the estimated portion of receivables that may not be collected.

Accounts Receivable

Represents money owed to a company by its customers for goods or services delivered but not yet paid for.