Check those assumptions: 1. np 450.8 x which is v 2. n(1-P)- 1509.2 x which is v 3. N= 1000000 o which is v 10 If no N is given in the problem, use 1000000 0° 10 39200 ✓o Or

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According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft, 23%
of all complaints in 2007 were for identity theft ('Consumer fraud and, 2008). Assume a state had 405
complaints of identity theft out of 1960 consumer complaints. Calculate a 94% confidence interval for the
proportion of all complaints that are complaints of identity theft in that state.
P: Parameter
What is the correct parameter symbol for this problem?
What is the wording of the parameter in the context of this problem?
The percentage of all consumer complaints in that state that are for identity theft
A: Assumptions
• Since qualitative
information was collected from each object, what conditions do we need
to check? Check all that apply.
In 30 or normal population.
✔n(1-p) ≥ 10
On(1-p) ≥ 10
Oo is unknown.
✔N > 20n
np > 10
o is known.
□n (p) > 10
Check those assumptions:
1. np 450.8
x which is 2
2. n(1-p)- 1509.2
3. N= 1000000
x which is v
which is 21
10
If no N is given in the problem, use 1000000
10
39200
✓0⁰
oa
Transcribed Image Text:According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft, 23% of all complaints in 2007 were for identity theft ('Consumer fraud and, 2008). Assume a state had 405 complaints of identity theft out of 1960 consumer complaints. Calculate a 94% confidence interval for the proportion of all complaints that are complaints of identity theft in that state. P: Parameter What is the correct parameter symbol for this problem? What is the wording of the parameter in the context of this problem? The percentage of all consumer complaints in that state that are for identity theft A: Assumptions • Since qualitative information was collected from each object, what conditions do we need to check? Check all that apply. In 30 or normal population. ✔n(1-p) ≥ 10 On(1-p) ≥ 10 Oo is unknown. ✔N > 20n np > 10 o is known. □n (p) > 10 Check those assumptions: 1. np 450.8 x which is 2 2. n(1-p)- 1509.2 3. N= 1000000 x which is v which is 21 10 If no N is given in the problem, use 1000000 10 39200 ✓0⁰ oa
N: Name the procedure
The conditions are met to use a [1-Proportion Z-Interval
I: Interval and point estimate
The symbol and value of the point estimate on this problem are as follows:
405
1750
x Leave answer as a fraction.
o is 0.213 X 0.250
7
The interval estimate for
Round endpoints to 3 decimal places.
C: Conclusion
X)
• We are 94
0% confident that the
The percentage of all consumer complaints in that state that are for identity theft
is between 21.3
x% and 25
Transcribed Image Text:N: Name the procedure The conditions are met to use a [1-Proportion Z-Interval I: Interval and point estimate The symbol and value of the point estimate on this problem are as follows: 405 1750 x Leave answer as a fraction. o is 0.213 X 0.250 7 The interval estimate for Round endpoints to 3 decimal places. C: Conclusion X) • We are 94 0% confident that the The percentage of all consumer complaints in that state that are for identity theft is between 21.3 x% and 25
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