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In-s [12.5K]
3 years ago
14

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) Bank B​ (individual lines)

6.5 4.3
6.6 5.3
6.6 5.8
6.8 6.2
7.0 6.7
7.3 7.7
7.4 7.7
7.7 8.4
7.7 9.2
7.8 9.9
Mathematics
1 answer:
victus00 [196]3 years ago
8 0
Ghdxvdhusiababsidjwbsifkdnsjcidnbsickdbs
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Step-by-step explanation:

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Where 'p' is the proportion of students who responded 'yes', 'z' is the z-score for a 95% confidence interval (which is known to be 1.960), and 'n' is the number of students in the sample.

If the confidence interval is from 0.584 to 0.816, then:

p=\frac{0.584+0.816}{2}=0.7 \\0.816-0.584=2*(1.96*\sqrt{\frac{p*(1-p)}{n}}) \\0.116=1.96*\sqrt{\frac{0.7*(1-0.7)}{n}}\\n=16.8966^2*(0.7*0.3)\\n=60\ students

60 students were in the sample.

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trapecia [35]

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Step-by-step explanation:

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4 years ago
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Solnce55 [7]

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.006453

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6.453 x 10^-3

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