Waiting times (in minutes) of customers at a bank where all customers enter a single waiting line and a bank where customers wa it in individual lines at three different teller windows are listed below. Find the coefficient of variation for each of the two sets of data, then compare the variation. Bank A (single line): 6.5 6.6 6.7 6.8 7.0 7.2 7.3 7.7 7.7 7.7
Bank B (individual lines): 4.1 5.5 5.7 6.2 6.7 7.6 7.6 8.5 9.4 9.8
The coefficient of variation for the waiting times at Bank A is _%.
(Round to two decimal places as needed.)
The coefficient of variation for the waiting times at the Bank B is _%.
(Round to two decimal places as needed.)
Is there a difference in variation between the two datasets?
A.There is no significant difference in the variations.
B.The waiting times at Bank B have considerably less variation than the waiting times at Bank A.
C.The waiting times at Bank A have considerably less variation than the waiting times at Bank B.
1 answer:
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.
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The <span>reciprocals are the negitives of the number like -2 & -4 so the anser is -3</span>
Attached a solution and showed work.
Answer:
rational
Step-by-step explanation:
any number that can be written as a fraction is rational, it is also a termintating decimal.
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