Scores on an IQ Test Are Normally Distributed $\sigma = 15$

question 62

Multiple Choice

Scores on an IQ test are normally distributed. A sample of 19 IQ scores had standard deviation s=9 . The developer of the test claims that the population standard deviation is $\sigma = 15$ Do these data provide sufficient evidence to contradict this claim? Use the $\alpha = 0.05$ level of significance.

• A) Reject \(H _ { 0 } .\)
• The population standard deviation appears to differ from 15 .
• B) Do not reject \(H _ { 0 }\)
• There is insufficient evidence to conclude that the population standard deviation differs from 15 .

---

Definitions:

Vouchers Payable

An accounting term used to represent records of transactions or evidence of expenditure awaiting payment.

Withdrawals

A subdivision of owner’s equity that records money or other assets an owner withdraws from a business for personal use.

Vouchers Payable

Short-term obligations or liabilities that represent amounts owed to suppliers or creditors, which are supported by documentary evidence of the transaction.

Accounts Payable

Liabilities or amounts owed to creditors for goods and services that have been received but not yet paid for by the business.