For the Following Question(s): a Sociologist Interested in Cultural Differences

question 33

Multiple Choice

For the following question(s) : A sociologist interested in cultural differences compared women of two ethnic groups on a Role Approval Index (high scores mean high degrees of approval of one's social role) . The results were as follows:
Ethnic Group A: N = 15 M = 55 S² = 6.5
Ethnic Group B: N = 23 M = 51 S² = 4.5
-If the standard deviation of the distribution of the difference between means is .76, what is the t score?

• A)(15-23)/.76 = -10.53
• B)()76)(15-23)= -8.00
• C)[(6.5 + 4.5)/2][.76] = 4.18
• D)(55-51)/.76 = 5.26

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Definitions:

Rhizobium

A genus of bacteria that forms symbiotic relationships with legumes, fixing nitrogen from the air into a form that plants can use for growth.

Nitrogen Fixation

The process by which certain bacteria convert atmospheric nitrogen into ammonia, making it available for plants and other organisms.

Earth's Tilt

The angle between Earth's rotational axis and its orbital axis, which significantly influences seasonal changes and climate.

Denitrification

A microbial process by which nitrogen in the soil is converted back into gaseous nitrogen, removing it from the ecosystem.