SOLUTION: The following data gives the heights (in feet) of eruptions of Old Faithful in Yellowstone National Park. 140 154 140 140 160 140 150 150 160 155 125 136 140 155 130 125 125

Question 367896: The following data gives the heights (in feet) of eruptions of Old Faithful in Yellowstone National Park.
140 154 140 140 160 140 150 150 160 155 125
136 140 155 130 125 125 139 125 140 140 135
141 140 139 110 140 135 140 135 140 139 100
105 130 135 131 135 153 155 140 150 153 120
Use the data from this sample to construct a 95% confidence interval for the proportion of Old Faithful eruptions that exceed 140 feet in height.

n=
p=
q=
Za/2=
E=
Interval:

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The following data gives the heights (in feet) of eruptions of Old Faithful in Yellowstone National Park.
140 154 140 140 160 140 150 150 160 155 125
136 140 155 130 125 125 139 125 140 140 135
141 140 139 110 140 135 140 135 140 139 100
105 130 135 131 135 153 155 140 150 153 120
Use the data from this sample to construct a 95% confidence interval for the proportion of Old Faithful eruptions that exceed 140 feet in height.
n= 44
p=11/44 = 1/4
q= 3/4
Za/2= 1.96
E= 1.96*sqrt((1/4)*(3/4)/44) 0.1279
Interval:
0.25-0.1279 < p < 0.25+0.1279
===================================
Cheers,
Stan H.

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