To complete the poll reported in Exercise 9, Pew Research surveyed respondents by telephone, drawing a random
Question:
To complete the poll reported in Exercise 9, Pew Research surveyed respondents by telephone, drawing a random sample of landlines and another random sample of cell phones. For those numbers that were valid, they report the following:
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Are the results they find independent of the telephone type?
a) Under the usual null hypothesis, what are the expected values?
b) Compute the x2 statistic.
c) How many degrees of freedom does it have?
d) What do you conclude?
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a The expected values under the null hypothesis are shown ...View the full answer
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Related Book For 
Business Statistics
ISBN: 9780321925831
3rd Edition
Authors: Norean Sharpe, Richard Veaux, Paul Velleman
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