A teller at a drive-up window at a bank had the following service times (in minutes) for 20 randomly selected customers: SAMPLE 1 2 3 4.5 4.6 4.5 4.7 4.2 4.5 4.6 4.6 4.2 4.4 4.4 4.8 4.3 4.7 4.4 4.5 4.3 4.3 4.6 4.9 a. Determine the mean of each sample. b. If the process parameters are unknown, estimate its mean and standard deviation. c. Construct control charts for means and ranges using Table 10.3. Are any samples beyond the control limits? If so, which one(s)? d. If the process has a known mean of 4.4 and a known standard deviation of .18, what would three-sigma control limits be for a mean chart? Are any sample means beyond the control limits? If so, which one(s)? of 10 1595 words E English (United States) Focus APR tv AA A
A teller at a drive-up window at a bank had the following service times (in minutes) for 20 randomly selected customers: SAMPLE 1 2 3 4.5 4.6 4.5 4.7 4.2 4.5 4.6 4.6 4.2 4.4 4.4 4.8 4.3 4.7 4.4 4.5 4.3 4.3 4.6 4.9 a. Determine the mean of each sample. b. If the process parameters are unknown, estimate its mean and standard deviation. c. Construct control charts for means and ranges using Table 10.3. Are any samples beyond the control limits? If so, which one(s)? d. If the process has a known mean of 4.4 and a known standard deviation of .18, what would three-sigma control limits be for a mean chart? Are any sample means beyond the control limits? If so, which one(s)? of 10 1595 words E English (United States) Focus APR tv AA A
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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A teller at a drive-up window at a bank had the following service times (in minutes) for 20
randomly selected customers:
SAMPLE
1
2
3
4.
4.5
4.6
4.5
4.7
4.2
4.5
4.6
4.6
4.2
4.4
4.4
4.8
4.3
4.7
4.4
4.5
4.3
4.3
4.6
4.9
a. Determine the mean of each sample.
b. If the process parameters are unknown, estimate its mean and standard deviation.
c. Construct control charts for means and ranges using Table 10.3. Are any samples
beyond the control limits? If so, which one(s)?
d. If the process has a known mean of 4.4 and a known standard deviation of .18, what
would three-sigma control limits be for a mean chart? Are any sample means beyond
the control limits? If so, which one(s)?
of 10
1595 words
E English (United States)
O Focus
APR
étv A A.
MacBook Air
20
F3
F1
000
000
F4
F2
>>
F5
F6
F7
F8
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