Mathematics, 13.01.2021 17:40 yes1225
The travel-to-work time for residents in Ventura County is unknown. Assume the population variance is 39. How large should a sample be if the margin of error is 1 minute for a 93% confidence interval
Answers: 1
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
.
, so 
is the standard deviation of the population(square root of the variance) and n is the size of the sample.
. We have that 
. So
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The travel-to-work time for residents in Ventura County is unknown. Assume the population variance i...
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