IQ Test Scores Are Normally Distributed with a Mean of 100

question 124

Multiple Choice

IQ test scores are normally distributed with a mean of 100 and a standard deviation of 15. An individualʹs IQ score is found to be 90. Find the z-score corresponding to this value.

• A)-0.67
• B)0.67
• C)1.33
• D)-1.33

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Definitions:

Contra Asset

An account that is used to reduce the value of a related asset, such as accumulated depreciation reducing the book value of fixed assets.

Normal Balance

The side (debit or credit) of an account that is expected to have a higher balance, indicating the side which increases the account.

Allowance Method

A financial method that estimates the value of debts unlikely to be collected by determining uncollectible accounts each period's end.

Allowance for Doubtful Accounts

A contra asset account that represents the estimated proportion of accounts receivable that may not be collectable.