7.48 The Graded Naming Test and sociocultural differences: Researchers often use z tests to compare their samples to known population norms. The Graded Naming Test (GNT) asks respondents to name objects in a set of 30 black-and-white drawings. The test, often used to detect brain damage, starts with casy words like kangaroo and gets progressively more difficult, end- ing with words like sextant. The GNT population norm for adults in England is 20.4. Roberts (2003) wondered whether a sample of Canadian adults had different scores than adults in England. If they were different, the English norms would not be valid for use in Canada. The mean for 30 Canadian adults was 17.5. For the purposes of this exercise, assume that the standard deviation of the adults in England is 3.2. a. Conduct all six steps of a z test. Be sure to label all six steps. b. Some words on the GNT are more commonly used in England. For example, a mitre, the headpiece worn by bishops, is worn by the archbishop of Can- terbury in public ceremonies in England. No Cana- dian participant correctly responded to this item, whereas 55% of English adults correctly responded. Explain why we should be cautious about applying norms to people different from those on whom the test was normed. C. When we conduct a one-tailed test instead of a two-tailed test, there are small changes in steps 2 and 4 of bypothesis testing. (Note: For this example. assume that those from populations other than the one on which it was normed will score lower, on average. That , hypothestre that thie Canadians will have a lower mean Conduct steps 2, 4, and 6 of lypothess testing for a one tailed test d Under which inntancea one taled or a two

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Naming Test and sociocultural
differences: Researchers often use z tests to compare
wondered whether a sample of Canadian adults had
different scores than adults in England. If they were
different, the English norms would not be valid for
use in Canada. The mean for 30 Canadian adults was
17.5. For the purposes of this exercise, assume that the
standard deviation of the adults in England is 3.2.
7.48 The Graded
their samples to known population norms. The Graded
Naming Test (GNT) asks respondents to name objects
in a set of 30 black-and-white drawings. The test, often
used to detect brain damagge, starts with casy words
like kangaroo and gets progressively more difficult, end-
ing with words like sextant. The GNT population
norm for adults in England is 20.4. Roberts (2003)
a. Conduct all six steps of a z test. Be sure to label all
six steps.
b. Some words on the GNT are more commonly
used in England. For example, a mitre, the headpiece
worn by bishops, is worn by the archbishop of Can-
terbury in public ceremonies in England. No Cana-
dian participant correctly responded to this item,
whereas 55% of English adults correctly responded.
Explain why we should be cautious about applying
norms to
people different from those on whom the
test was normed.
When we conduct a one-tailed test instead of a
two-tailed test, there are small changes in steps 2
and 4 of hypothesis testing. (Note: For this example,
assume that those from populations other than the
one on which it was normed will score lower, on
average. That is, hypothesize that the Canadians will
have a lower mean.) Conduct steps 2, 4, and 6 of
hypothesis testing for a one-tailed test.
d. Under which circumstancea one tailed or a two-
Transcribed Image Text:Naming Test and sociocultural differences: Researchers often use z tests to compare wondered whether a sample of Canadian adults had different scores than adults in England. If they were different, the English norms would not be valid for use in Canada. The mean for 30 Canadian adults was 17.5. For the purposes of this exercise, assume that the standard deviation of the adults in England is 3.2. 7.48 The Graded their samples to known population norms. The Graded Naming Test (GNT) asks respondents to name objects in a set of 30 black-and-white drawings. The test, often used to detect brain damagge, starts with casy words like kangaroo and gets progressively more difficult, end- ing with words like sextant. The GNT population norm for adults in England is 20.4. Roberts (2003) a. Conduct all six steps of a z test. Be sure to label all six steps. b. Some words on the GNT are more commonly used in England. For example, a mitre, the headpiece worn by bishops, is worn by the archbishop of Can- terbury in public ceremonies in England. No Cana- dian participant correctly responded to this item, whereas 55% of English adults correctly responded. Explain why we should be cautious about applying norms to people different from those on whom the test was normed. When we conduct a one-tailed test instead of a two-tailed test, there are small changes in steps 2 and 4 of hypothesis testing. (Note: For this example, assume that those from populations other than the one on which it was normed will score lower, on average. That is, hypothesize that the Canadians will have a lower mean.) Conduct steps 2, 4, and 6 of hypothesis testing for a one-tailed test. d. Under which circumstancea one tailed or a two-
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