In 1950, a research team digging near Folsom, New Mexico, found charred bison bones along with some leaf-shaped projectile points (called the "Folsom points") that had been made by a Paleo-Indian hunting culture. It was clear from the evidence that the bison had been cooked and eaten by the makers of the points, so that carbon-14 dating of the bones made it possible for the researchers to determine when the hunters roamed North America. Tests showed that the bones contained between 27 % and 30 % of their original carbon-14. Use this information to show that the hunters lived roughly between 9000 B.C. and 8000 B.C.
In 1950, a research team digging near Folsom, New Mexico, found charred bison bones along with some leaf-shaped projectile points (called the "Folsom points") that had been made by a Paleo-Indian hunting culture. It was clear from the evidence that the bison had been cooked and eaten by the makers of the points, so that carbon-14 dating of the bones made it possible for the researchers to determine when the hunters roamed North America. Tests showed that the bones contained between 27 % and 30 % of their original carbon-14. Use this information to show that the hunters lived roughly between 9000 B.C. and 8000 B.C.
In 1950, a research team digging near Folsom, New Mexico, found charred bison bones along with some leaf-shaped projectile points (called the "Folsom points") that had been made by a Paleo-Indian hunting culture. It was clear from the evidence that the bison had been cooked and eaten by the makers of the points, so that carbon-14 dating of the bones made it possible for the researchers to determine when the hunters roamed North America. Tests showed that the bones contained between
27
%
and
30
%
of their original carbon-14. Use this information to show that the hunters lived roughly between 9000 B.C. and 8000 B.C.
Zhou and Vohs (2009) published a study showing that handling money reduces the perception of pain. In the experiment, a group of college students was told that they were participating in a manual dexterity study. Half of the students were given a stack of money to count and the other half got a stack of blank pieces of paper. After the counting task, the participants were asked to dip their hands into bowls of very hot water (122° F) and rate how uncomfortable it was. The following data show ratings of pain similar to the results obtained in the study.
Counting Money
Counting Paper
7
9
8
11
10
13
6
10
8
11
5
9
7
15
12
14
5
10
Convert the data from this problem into a form suitable for the point-biserial correlation (use Y = 1 for the money and 0 for the plain paper), and then compute the correlation.
∑X
∑Y
∑XY
SSXX
SSYY
SP
r
Square the value of the point-biserial correlation to obtain r².…
Illustration 16.1. (a) If a die (a cube of six marked 1 to 6) is rolled
without bias, find the chance that it may not show up 1.
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Given the data, answer questions 1to 3. Show solutions in computations
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