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2 answers:
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Answer:
The 90% confidence interval is
Step-by-step explanation:
From the question we are told that
The sample size is n = 64
The sample mean is
The standard deviation is
Given that the confidence interval is 90% then the level of significance is mathematically evaluated as
Next we obtain the critical value of from the normal distribution table , the value is
Generally the margin of error is mathematically represented as
=>
=>
The 90% confidence interval is mathematically represented as
=>
=>
Answer:
third side = 4
Step-by-step explanation:
third side is hypoenuse as it is opposite to 90 degree.
using pythagoras theorem
(perpendicular)^2 + (base)^2 = (hypotenuse)^2
2^2 + (2 )^2 = hypotenuse^2
4 + 4*3 = hypotenuse^2
16 = hypotenuse^2
= hypotenuse
4 = hypotensue