When Blood Levels Are Low at an Area Hospital, a Call

question 50

Multiple Choice

When blood levels are low at an area hospital, a call goes out to local residents to give blood. The blood center is interested in determining which sex - males or females - is more likely to respond.
Random, independent samples of 60 females and 100 males were each asked if they would be willing to give blood when called by a local hospital. A success is defined as a person who responds to the call and donates blood. The goal is to compare the percentage of the successes of the male and female responses. Suppose 45 of the females and 60 of the males responded that they were able to give blood. Find the test statistic that would be used if it is desired to test to determine if a difference exists between the proportion of the females and males who responds to the call to donate blood.

• A) \(\mathrm { z } = 1.96\)
• B) \(z = 1.93\)
• C) \(z = 1.645\)
• D) \(z = 2.01\)

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Definitions:

Haworth Structure

A way of depicting cyclic sugars in a planar ring form, useful in illustrating the stereochemistry of the molecule.

Ethyl β-D-Galactopyranoside

A chemical compound that consists of ethyl and galactose molecules, where the galactose component is in the pyranose ring form and the anomeric carbon is in the beta configuration.

Methyl Glycoside

A compound resulting from the reaction of a sugar with methanol where the sugar's anomeric carbon is linked to a methoxy group.

Galactose

A simple sugar (monosaccharide) that, together with glucose, forms lactose, the principal sugar in milk.