Answer:
133°
Step-by-step explanation:
If the angle is "x"
We can say:
Complement of the angle is 90 - x
Supplement of the angle is 180 - x
Given, ANGLE IS 8 less than 3 times its SUPPLEMENT, so we can write:
x = 3(180 - x) - 8
So, now multiply and solve for x:
Thus, the angle is 133 degrees
Answer:
Step-by-step explanation:
Given that n =30, x bar = 375 and sigma = 81
Normal distribution is assumed and population std dev is known
Hence z critical values can be used.
For 95% Z critical=1.96
Margin of error =
Confidence interval = 375±29
=(346,404)
B) 99% confidence
Margin of error = 2.59*Std error =38
Confidence interval = 375±38
=(337, 413)
C) For 90%
Margin of error = 20
Std error = 20/1.645 = 12.158
Sample size
Atleast 44 people should be sample size.