Answer:
(21.4, 18.6)
Step-by-step explanation:
Given that:
Mean (μ) = $20 per week
Standard deviation (σ) = $5
number of sample (n) = 49
Confidence level = 95% = 0.95
α = 1 - 0.95 = 0.05
from the probability table.
The margin of error (e) =
Confidence interval = μ ± e = (μ + e, μ - e) = (20 + 1.4, 20 - 1.4) = (21.4, 18.6)
Answer:
The answer to 9 is table A
Step-by-step explanation:
The table has the value of x as -4 in two different spots, therefore it would fail the vertical line test. You could change one of the two values with -4 to anything but -4
Answer:
To get the circumference, multiply the diameter by pi. You have the diameter in meters, and you were given an approximate value of pi. Multiply these 2 numbers, and get the circumference in meters.
Step-by-step explanation: