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: Land Cell Total No 552 42 594 Answer/Busy Voicemail 3347 2843 6190 Contact 8399 8612 17,011 Total 12,298 11,497 23,795 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 chi squared statistic. c) How many degrees of freedom does it have? d) What do you conclude?
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: Land Cell Total No 552 42 594 Answer/Busy Voicemail 3347 2843 6190 Contact 8399 8612 17,011 Total 12,298 11,497 23,795 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 chi squared statistic. c) How many degrees of freedom does it have? d) What do you conclude?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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