Answer:
C.The waiting times at Bank A have considerably less variation than the waiting times at Bank B.
Step-by-step explanation:
The Coefficient of variation "shows the extent of variability in relation to the mean of the population" and is defined as:
And the best estimator is
Where the sample mean is obtained from:
And the sample deviation from:
Bank A
Bank B
And the best option for this cas based on the results obtaines is:
C.The waiting times at Bank A have considerably less variation than the waiting times at Bank B.
You are expected to use a z-score table to find how many standard deviations correspond to having 10% outside the bounds. It is like having 68% within 1σ. The table interpolates.
I'm sorry I looked everywhere and I still cannot find how to calculate with the data provided. I'm new to stats so any help is appreciated, if there is any more information let me know and I could solve it.
<span>A linear equation is an equation between two variables that gives a straight line when plotted on a graph.</span>
8.1x - 4.5y = 5.4.....subtract 8.1x from both sides
-4.5y = -8.1x + 5.4...divide both sides by -4.5
y = (- 8.1/-4.5)x + 5.4 / -4.5...simplify
y = 1.8x - 1.2 <==