I wish I could help you but Im doing this so i can ask sum
Step-by-step explanation:
We want to compare the means, so find the difference and the corresponding standard deviation:
μ = μ₁ − μ₂
μ = 25 − 23
μ = 2
σ = √(σ₁²/n₁ + σ₂²/n)
σ = √(3.1²/50 + 3.2²/50)
σ = 0.63
Using a 95% confidence level, z = 1.96. So the interval is:
CI = 2 ± 1.96 × 0.63
CI = 2 ± 1.2
There is a 95% probability that the true difference in means is between 0.8 and 3.2. Since 0 is not in this interval, we can conclude that there is a significant difference between the commute times for the two populations.
Answer:
0.88888889, 88.888889%,
Step-by-step explanation:
Convert to decimal, and convert decimal to percentage.
Answer:
i don't know the answer yet , I'm quite not sure
Answer: 9 + 10 = 19
Step-by-step explanation: 9+ 0 =9
and 1+0 = 1
put those together and you get 19
