Which of the Following Represents a Limitation (I

question 31

Multiple Choice

Which of the following represents a limitation (i.e.,a threat to internal validity) for any correlational study of the relationship between smoking and lung cancer?

• A) Some relevant factors could not be examined in a correlational study,but all these factors could be directly manipulated in an experiment.
• B) A correlational study about smoking is more difficult to set up than a controlled experiment.
• C) Smoking incidence could be confounded with other variables that might increase susceptibility to cancer.
• D) It is not possible to construct a contingency table that maps out the relationship between variables.

---

Definitions:

Variable N

A symbol or placeholder for an unknown or changing quantity in mathematics and science.

Certificate Of Deposit (CD)

A certificate that states there is a specific sum of money on deposit and guarantees the payment of a fixed interest rate after a certain period of time, usually seven days to ten years; deposits and withdrawals cannot be made with a CD.

Money Market Account

An account that pays a higher interest rate than other types of accounts, but usually requires a higher initial deposit and a higher minimum balance often with a limit on the number of transactions per month.

Statement Savings Account

A statement savings account is a type of savings account that provides the account holder with periodic statements, detailing transactions and balances.