Assigned Media Question Help The table to the right shows the results of a surve
ID: 3318667 • Letter: A
Question
Assigned Media Question Help The table to the right shows the results of a survey in which 400 adults from the East, 400 aduits from the South, 400 adults from(Adults who say that traffic congestion is a serious problem Midwest, and 400 adults from the West were asked traffic congestion is a serious problem Complete parts (a) and (b)East 34% South Midwest West 53% Thw 90% cotonn vimval tu he proportonofadas hon, the Midwest wo sey tr.afic corgeshn%0 sertu ghtlern-C Round to tree deomal places as needed ).Explanation / Answer
solution:-
CI interval for 99% is z*sqrt{ (p)*(1-p)/n}
= 2.58*sqrt {(0.26)(0.74)/400}
= 2.576 * 0.0219
= 0.056
a 99% confidence interval for the proportion of adults from the midwest who say traffic congestion is a serious problem.