تم الحل ✓
categoryإحصاء
schoolبكالوريوس
event_available2026-07-14
السؤال
Transcribed Image Text:
For the year 2010, 33% of taxpayers with adjusted gross incomes between $30,000 and
$60,000 itemized deductions on their federal income tax return. The mean amount of
deductions for this population of taxpayers was $16,642. Assume that the standard deviation is
σ = $2,540. If required, round your answer to two decimal places.
(a) What are the sampling distributions of x for itemized deductions for this population of
taxpayers for each of the following sample sizes: 30, 50, 100, and 400?
E(X)
= $
n
30
50
100
400
+A
+A
σ(x)
(b) What is the advantage of a larger sample size when attempting to estimate the population
mean?
A larger sample - Select your answer-
- Select your answer
the standard error and results in a
precise estimate of the population mean.
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