Answer:
C. [21.80, 22.80]
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find M as such
In which is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 22.3 - 0.5 = 21.8 hours.
The upper end of the interval is the sample mean added to M. So it is 22.3 + 0.5 = 22.8 hours
So the correct answer is:
C. [21.80, 22.80]
Answer:
+/- 1 , +/- 1/5, +/- 11, +/- 11/5.
Step-by-step explanation:
Factor:11 = 1 * 11
Factor 5 = 1 * 5 (Both prime numbers)
The possible roots are
+/- 1 , +/- 1/5, +/- 11, +/- 11/5.
Answer:
12
Step-by-step explanation:
(6+24÷3)−2
(6+8)−2
14−2
12
Answer:
9.425 or 3π
Step-by-step explanation:
arc length = 2πr(θ/360)
The angle is 90˚ as indicated by the square symbol.
ABC = 2π6(90/360) = 9.425 or 3π
Answer:
uh what question
Step-by-step explanation: