In this section you learned how to compute a confidence interval for the mean using T-Test
In this section you learned how to compute a confidence interval for the mean using T-Test
In this section you are dealing with ____one sample interval for the mean___________________ data.
The symbol for the parameter in this section is _ __.
The symbol for the point estimate for that parameter is ? __.
What input screen do you use for the interval estimate? T Interval ___________________________________
What graph do we look at to see if there are any outliers? __ plots____________________________
If n is at least 30, does the population have to be normally distributed? __ ____
Fill in the following as you work through your given problems in MyOpenMath
1. individual object: _ _____________________________________________
Variable:
What type of variable is this? quantitative-discrete quantitative-continuous qualitative
P:
μ
A: (Reference the graphs you checked in StatCrunch for this data)
n≥30 or normal population
σ is unknown
no outliers in the data
N:
The conditions are met to use a T interval
I:
X ? = 91.699 percent
μ = (89.252 percent, 94.146 percent)
C:
We are 97% confident that the mean percentage of woman receiving prenatal care of all countries in 2009
is between 89.252 percent and 94.146 percent.
Rewrite the interval above as point estimate ± margin of error: _________________________
2. individual object: __elderly people____________________________________________
Variable: _the mean forward sway__________________________________
What type of variable is this? quantitative-discrete quantitative-continuous qualitative
P:
μ
The mean forward sway of all elderly people
A: (Reference the graphs you checked using StatCrunch for this data)
Since quantitative information was collected from each object, what conditions do we need to check? Check all that apply.
n≥30 or normal population
σ is unknown
no outliers in the data
N:
The conditions are met to use a T interval
I:
X ? = 27.5 mm
μ = (22.7 mm, 32.4 mm)
C:
We are 99% confident that the mean forward sway of all elderly people is between 22.7 mm and 32.4 mm
Rewrite the interval above as point estimate ± margin of error: 27.5 ± ___________
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