Answer:
the 90% confidence interval is ( 48.684 , 51.316 )
Step-by-step explanation:
Given that :
the sample size = 36
Sample Mean = 50
standard deviation = 4.80
The objective is to calculate a 90% confidence interval.
At 90% confidence interval ;
the level of significance = 1 - 0.9 = 0.1
The critical value for
= 1.645
The standard error S.E =
=
= 0.8
The Confidence interval level can be computed as:
For the lower limit :
=50 - 1.316
= 48.684
For the upper limit :
=50 + 1.316
= 51.316
Thus, the 90% confidence interval is ( 48.684 , 51.316 )
8 and 4 equals 32
3 and 4 equal 12.......
Answer:
(-3.5,-2)
Step-by-step explanation:
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R is the midpoint of KL ;
Thus R bisects KL , which means :
So :
Add sides 10
Subtract sides 3x
Divide sides by 4
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