Answer: 7208 remainder 5
Step-by-step explanation:
Answer:
The answer is a. -7
Step-by-step explanation:
Given,
We know,
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Answer: A
Step-by-step explanation: Hope this helps :)
Answer:
C) -6-(-3)=3
Step-by-step explanation:
-6-(-3)=
-6+3=
-3 (Not positive 3)
So the third one is incorrect
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.
