CTQ Trees are used to decompose customer needs into product or process
characteristics.
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True
Explanation
Critical To Quality (= CTQ) Trees break down customer needs (e.g. I want
good tea) into drivers (e.g. taste, temperature, cost) and from there into
requirements (e.g. rich and non-acidic taste, temperature between 160 - 185
°F, price between $1.50 and $2.50).
In Design of Experiments (DOE), a treatment is a specific combination of factor levels.
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True
Explanation
, Treatment = specific combination of factor levels
Continuous data can be numeric or categorical.
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True
Explanation
Categorical data (e.g. t-shirt sizes of XS, S, M, L, XL) is not continuous.
A sample of 224 items has been selected from a population with a mean 80 and a
standard deviation of 5.2. What is the z value that the sample has a mean 73?
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-1.34615
Explanation
z = (x - μ) / σ = (73 - 80) / 5.2 = -1.34615 which is a probability of 0.0885
Which control chart should be used to monitor the mean of continuous data for
subgroup sizes of 14?
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, Xbar-S chart
Explanation
There are different control charts, e.g. for attribute and continuous data.
Xbar-S charts are used for continuous data with subgroup sizes larger than
9.
Cpk is known as
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Process capability index
Explanation
Process Capability = Cp
Process Capability Index = Cpk
Process Performance = Pp
Process Performance Index = Ppk
There are 8 possible defects in a company's invoicing process. The billing team
checks 6,432 invoices and finds 279 errors. What is the DPU?
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0.04337
Explanation
DPU = number of defects / number of units = ,432= 0.04337.
The histogram is
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characteristics.
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True
Explanation
Critical To Quality (= CTQ) Trees break down customer needs (e.g. I want
good tea) into drivers (e.g. taste, temperature, cost) and from there into
requirements (e.g. rich and non-acidic taste, temperature between 160 - 185
°F, price between $1.50 and $2.50).
In Design of Experiments (DOE), a treatment is a specific combination of factor levels.
Give this one a try later!
True
Explanation
, Treatment = specific combination of factor levels
Continuous data can be numeric or categorical.
Give this one a try later!
True
Explanation
Categorical data (e.g. t-shirt sizes of XS, S, M, L, XL) is not continuous.
A sample of 224 items has been selected from a population with a mean 80 and a
standard deviation of 5.2. What is the z value that the sample has a mean 73?
Give this one a try later!
-1.34615
Explanation
z = (x - μ) / σ = (73 - 80) / 5.2 = -1.34615 which is a probability of 0.0885
Which control chart should be used to monitor the mean of continuous data for
subgroup sizes of 14?
Give this one a try later!
, Xbar-S chart
Explanation
There are different control charts, e.g. for attribute and continuous data.
Xbar-S charts are used for continuous data with subgroup sizes larger than
9.
Cpk is known as
Give this one a try later!
Process capability index
Explanation
Process Capability = Cp
Process Capability Index = Cpk
Process Performance = Pp
Process Performance Index = Ppk
There are 8 possible defects in a company's invoicing process. The billing team
checks 6,432 invoices and finds 279 errors. What is the DPU?
Give this one a try later!
0.04337
Explanation
DPU = number of defects / number of units = ,432= 0.04337.
The histogram is
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