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Survey response rate. Pew Research reported in 2012 that

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QUESTION:

Survey response rate. Pew Research reported in 2012 that the typical response rate to their surveys is only 9%. If for a particular survey 15,000 households are contacted, what is the probability that at least 1,500 will agree to respond?5

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QUESTION:

Survey response rate. Pew Research reported in 2012 that the typical response rate to their surveys is only 9%. If for a particular survey 15,000 households are contacted, what is the probability that at least 1,500 will agree to respond?5

ANSWER:

Step 1 of 2

We can consider this as a Binomial distribution with,

The number of trials, n = 15000

The number of successes, k = 1500

Probability of success, p = 0.09

We also need to verify that both np and n(1 ? p) are at least 10:

Hence both conditions are satisfied.

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