The answer is 5.5
The standard deviation (sd or σ) of the sample mean difference is:
sd = √(sd₁²/n₁ + sd₂²/n₂)
For the population A:
sd₁ = 17.6
n₁ = 25
For the population B:
sd₂ = 21.2
n₂ = 30
Hence:
sd = √(sd₁²/n₁ + sd₂²/n₂)
= √(17.6²/20 + 21.2²/30)
= √(309.76/20 + 449.44/30)
= √(15.49 + 14.98)
= √(30.47)
= 5.5
Answer:
Slope = 3
Step-by-step explanation:
Hope it helps you!
We know there are 52 weeks in a year, so dividing those by two gets us the amount of times the person gets paid in a year. 52 % 2 = 26. Now multiply the salary by 26 (863 × 26 = 22458) to get his annual salary of $22458.
Answer: The second option.
Step-by-step explanation:
By the end of the 7 days you will have collected $100,000 but if you choose the first option you'd only end up with $17,000.