A Researcher Records the Crying Time (In Minutes)of Infants Given

question 27

Multiple Choice

A researcher records the crying time (in minutes) of infants given oral administration of sucrose (n = 12) or tap water (n = 16) prior to a heel prick.The mean crying time in the sucrose group was 3.3 ± 2.4 (M ± SD) min; in the tap water group,it was 7.3 ± 1.6 (M ± SD) min.If the null hypothesis is that there is no difference in crying time,then what is the decision for this test?

• A) Crying time was significantly reduced among infants given the water solution prior to a heel prick.
• B) Crying time was not reduced among infants given the sucrose solution prior to a heel prick.
• C) Crying time was significantly reduced among infants given the sucrose solution prior to a heel prick.
• D) Crying time was the same in both groups.

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Definitions:

Perfect Competitor

Refers to a theoretical market structure where numerous small firms compete against each other with no single company influencing the market price or supply of a product.

Standardized Product

Goods or services that are uniform in quality and performance, allowing them to be interchangeable, which facilitates mass production and broad market acceptance.

Demand Curve

A graphical representation showing the relationship between the price of a good and the quantity demanded by consumers at those prices.

Average Total Cost Curve

A graphical representation showing how the total cost per unit of output changes with the level of output.