Harper MTH165 Homework Section 8.2 Latest 2020 MAY
MTH165 ELEMENTARY STATISTICS
Homework Section 8.2
In this section you learned how to compute confidence intervalsfor the proportion using 1-Prop Z-Interval
In this section you are dealing with _____ one sample interval for the proportion __________________ data.
The parameter in this section is p ?___.
The point estimate for that parameter is _ p __.
What input screen do you use for the interval estimate?
Fill in the following as you work through your given problems in MyOpenMath
1. individual object: student______________________________________________
Variable: whether or not they are left handed ___________________________________
What type of variable is this? quantitative-discrete quantitative-continuous qualitative
P:
The percentage of all students from this campus that are left-handed
A:
Since qualitative information was collected from each object
n(pˆ)≥10
n(1−pˆ)≥10
N≥20n
N:
The conditions are met to use a 1-Proportion Z-Interval
I:
p? = 27/250
The interval estimate for p is (0.084 , 0.132)
C:
We are 92% confident that the percentage of all students from this campus that are left-handed is between 8.4% and 13.2%
Rewrite the interval above as point estimate ± margin of error: ________
2. individual object: _children _____________________________________________
Variable: _diagnosed with ASD __________________________________
What type of variable is this? quantitative-discrete quantitative-continuous qualitative
The percentage of all children in that state that are diagnosed with ASD
A:
Since qualitative information was collected from each object
n(pˆ)≥10
n(1−pˆ)≥10
N≥20n
N:
The conditions are met to use a 1-Proportion Z-Interval
I:
p? = 204/1610
The interval estimate for p is (0.109, 0.145)
C:
We are 95% confident that the percentage of all children in that state that are diagnosed with ASD is between 10.9% and 14.5%
Rewrite the interval above as point estimate ± margin of error: ___________________________
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