Question
In: Statistics and Probability
It was reported that 61% of individual tax returns were filed electronically in 2012. A random...
It was reported that 61% of individual tax returns were filed electronically in 2012. A random sample of 325 tax returns from 2013 was selected. From this sample,
233 were filed electronically.
a. Construct a 99% confidence interval to estimate the actual proportion of taxpayers who filed electronically in 2013.
A 99% confidence interval to estimate the actual proportion has a lower limit of __ and an upper limit of ___
Solutions
Expert Solution
We have given,
x=233
n=325
Estimate for sample proportion=0.7169
Level of significance is =1-0.99=0.01
Z critical value(using Z table)=2.576
Confidence interval formula is
=(0.6525,0.7813)
Lower limit for confidence interval=0.6525
Upper limit for confidence interval=0.7813
| A 99% confidence interval to estimate the actual proportion has a lower limit of 65.25% and an upper limit of 78.13% |
orchestra answered 2 years agoRelated Solutions
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