Answer: To find the critical value, follow these steps.
Compute alpha (α): α = 1 - (confidence level / 100)
Find the critical probability (p*): p* = 1 - α/2.
To express the critical value as a z-score, find the z-score having a cumulative probability equal to the critical probability (p*).
Step-by-step explanation:
Given :
Xinran walks 3 mi/h uphill, 4 mi/h on flat land and 5 mi/h downhill.
To Find :
If he walks one mile uphill, then one mile on flat land and then returns by the same route to his starting point, how many minutes does he walk.
Solution :
Time taken to walk one mile uphill is :

Time taken to walk two mile on flat land( one on going and one or returning ) is :

Time taken to walk one mile downhill is :

Total time taken :

Therefore, time taken un 62 minutes.
Answer:
Approximately 7 people.
Step-by-step explanation:
Make a proportion of x/6 and divide 40 by 6. We get 6.23333...
This is approximately 7 people.
Distance or meters and speed
Answer:
4
Step-by-step explanation: