Answer:
See explanation below
<u>Step-by-step explanation:</u>
range = 2200 - 300 = 1900
To find standard deviation, we have:
standard deviation = range/4 =
= 475
The range rule of thumb estimate for the standard deviation is 475
Given:
Standard deviation,
= 475
Margin of Error, ME = 100
= 1 - 0.90 = 0.10
Za/2 = Z0.05 = 1.64
Find sample size, n:
n ≥
n ≥
n ≥ 60.68
≈ 61
Minimun sample size,n = 61
8x+20 by multiplying 4 to 2x and 5 :)) hope this help!!!
Answer:
i
Step-by-step explanation:
In this problem, we are given a 10-minute range, from 45 to 55 minutes. The question is asking for a 1-minute range, 50.75 to 51.75 minutes. A 1-minute range out of a total 10-minute range gives us 1/10 chance, or 10% probability.