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Question 1
(Worth 1 points)
The Acculturation Rating Scale for Mexican Americans (ARSMA) is a psychological test
developed to measure the degree of Mexican/Spanish versus Anglo/English
acculturation of Mexican Americans. The distribution of ARSMA scores in a population
used to develop the test was approximately normal, with mean 3.0 and standard
deviation 0.8. A further study gave ARSMA to 50 firstgeneration Mexican Americans.
The mean of their scores is x bar = 2.36. If the standard deviation for the firstgeneration
population is also 0.8, give a 95% confidence interval for the mean ARSMA score for
firstgeneration Mexican Americans.
ESSAY SUBMISSION
2.36 ± 1.96 ((.8)/( 50))
√
2.36 ± 1.96 (.113137085)
2.36 ± .2217486866
2.36 + .2217486866 = 2.581748687
2.36  .2217486866 = 2.138251313
(2.1383, 2.5817)
Points earned on this question
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Question 2
(Worth 1 points)
What is the mean number of hours that high school students spend on homework per
week? It is known that the standard deviation of the population is 2.2 hours. In a random
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 Spring '11
 BUCKLEY

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