Using the table, give the percentage associated with each unit of standard deviation in the standard normal curve to the nearest hundredth
* Area, A(x) * Area, A(x)
0.2 0.0793 0.4861
2.2
0.4
0.1554
2.4
0.4918
O O O
0.6
0.2257
2.6
0.4953
0.8
0.2881
2.8
0.4974
1.0
0.3413
3.0
0.4987
0.4993
1.2
0.3849
3.2
1.4
0.4192
3.4
0.4997
1.6
0.4452
3.6
0.4998
1.8
0.4641
3.8
0.4999
2.0
0.4772
4.0
0.5000
Standard Devlation Percentage Area
-1 to 0
%
O to +1
%
O to +2
O to +3
<
-1 to +2

Acar traveling at 65 mph leaves 25 foot skid mark what is the ratio of the speed to length of skid mark (feet) in the simplest form

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

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