Answer: 20
Step-by-step explanation:
Formula to find the minimum sample size(n) when prior population standard deviation is known.
, where E = Margin of error , = Critical z-value for c confidence interval.
Given : E = 225 g , g
Critical z value for 90% confidence = 1.645
Now,
Hence, the required minimum sample size = 20
Answer:
2.8
Step-by-step explanation:
Do 0.4 x 3.5 first, that gives you 1.4, then divide that by 0.5, which is 2.8.
Answer:
8x + 11
Step-by-step explanation:
2x + 5 + 6x + 6
2x + 6x + 5 + 6
8x + 11
X=0.037
I would recommend using something like Math Papa for future problems like this.
X=55
Multiply both sides of the equation by 11
Move constant to the right-hand side and change its sign
Add the numbers