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Question: A friend reads in her Introduction to Psychology textbook about a minority group in Japan, the Burakumin, who are racially the same as other Japanese people but are viewed as outcasts because their ancestors were employed in positions that involved the handling of dead animals (e.g., butchers). In Japan, the text reported, mean IQ scores of Burakumin were 10 to 15 points below mean IQ scores of other Japanese. In the United States, where Burakumin experienced no discrimination, there was no mean difference (from Ogbu, 1986, as reported in Hockenbury & Hockenbury, 2003). Your friend says to you: "Wow-when I taught English in Japan last summer, I had a Burakumin student. He seemed smart; perhaps I was fooled." What should your friend consider about the two distributions, the one for Burakumin people and the one for other Japanese people?
question five thousand randomly-selected mba graduates were surveyed to determine their future plans. the survey
A similar survey of 37,000 adults in the US in 1966 found that 43% of adults were current smokers. Construct a 95% confidence interval for the difference between proportions of current smokers in 1991 and 1965.
a committee of eight members is to be formed from a group of eight men and eight women. assume people from the group
PROBABILITY IN STATISTICS ASSIGNMENT - What is the standard deviation (also called standard error) of the mean X¯ , i.e. σX¯ - What is the population variance of the difference between sample means
out of 10 trials a receiver got four cards correct. what is her success rate? what is her expected rate of success
Paired or not? In each of the following scenarios, determine if the data are paired. We would like to know if Intel's stock and Southwest Airlines' stock have similar rates of return. To nd out, we take a random sample of 50 days for Intel's stock ..
How many participants must be enrolled in the study? Assume that the standard deviation of total cholesterol is 18.5.
you want to give a bonus to the top 5 of your sales people and extra special attention to the bottom 25. average sales
Find an example of a poll based on a self-selected sample. Report the wording of the questions and the number who chose each response. Comment on whether or not you think the results can be extended to any population.
two random samples are taken with each group asked if they support a particular candidate. a summary of the sample
A recent survey by the insurance company showed the following probabilities for the number of bedrooms in each insured home. Find the standard deviation for the distribution.
Of the volunteers donating blood in a clinic, 80% have the Rhesus (Rh) factor present in their blood. If five volunteers are randomly selected, what is the probability that at least one does not have the Rh factor?
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