Answer:
its B
Step-by-step explanation:
hope it helped you
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Answer:
a) Sample size = 822
b) Margin of error = 0.03407
Step-by-step explanation:
We are given the following in the question:
p = 74% = 0.74
a) Sample size is required to obtain margin of error of 0.03
Formula:


Putting values, we get,

Thus, the sample size must be approximately 822 to obtain a 95% confidence interval with an approximate margin of error of 0.03
b) Margin of error for the 95% confidence interval
p = 54% = 0.54
Formula:


Putting values, we get,

The margin of error now will be 0.03407.
Answer:
The answer is 7,500
Step-by-step explanation:
31 rounds to 30 and 249 rounds to 250. 30 times 250 is 7,500. I hope this helps.