A simple random sample of 800 individuals provides 250 Yes responses.
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To calculate the proportion of Yes responses in the sample, we divide the number of Yes responses by the total sample size.
First, we divide 250 (the number of Yes responses) by 800 (the total sample size):
250 / 800 = 0.3125
The proportion of Yes responses in the sample is 0.3125, or 31.25%.
To convert this to a percentage, we can multiply the proportion by 100:
0.3125 * 100 = 31.25%
Therefore, 31.25% of the individuals in the sample responded "Yes".