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Quality Management (2025/26)

Quality Management (2025/26)

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What could be the reasons if in a data set, a large difference between the mean and the median has been identified?

Presence of outlier(s).

100%

Wrong process setting

None of the suggested

Lack of normality

100%

Excessive process variation

50%

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Which is the best way of calculating the estimated percentage of rejects in a normally distributed population?

By calculating the sample characteristics and using the Cumulative Standard Normal Distribution Function

By using the proportion of the rejects in the sample

None of the suggested

It is not possible to calculate

By calculating the ratio between the number of rejects in a sample and the sample size

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When selecting a measuring instrument for an inspection job, what is the recommended error/accuracy of the instrument?

Half the measuring range

None of the suggested

3 to 10 times smaller than the tolerance

100%

Bigger than the specified tolerance

Equal to the tolerance

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In hypothesis testing, what is the meaning of the Chi2 value?

a measure of the relative deviation between the empirical and theoretical frequency.

100%

None of the suggested

a number that indicates the level of confidence in testing a hypothesis

it is a number that indicates the significance level in the calculations.

it is a measure of data spread.

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When testing a data set for normality using Chi2 test, what would be the best course of action if a class with low (less than 5) actual frequency is identified?

Join it with the theoretical frequency

Re-distribute the intervals of the classes

Start all over again with a smaller number of classes

That is OK, no need to do anything

Both actual and theoretical frequencies for this class should be joined with those of the neighbouring class.

100%

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In Control Charts for variables, what are the relationships between control limits and tolerance limits?

Tolerance limits are wider than control limits.

100%

The control limits are equal to the tolerance limits.

Control limits should be inside tolerance limits.

100%

The tolerance should be within control limits

Control limits are wider than tolerance.

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What is the measurement method of a shaft’s circumference when using a caliper?

Direct and absolute

Direct and relative

Indirect and relative

Indirect

Absolute

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What is the first stage of the Quality Control process?

None of the suggested

Acting on the difference between the measured actual performance and the standard.

Quality Planning

Establishing standards

Choosing the control subject

100%

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If a part (cylindrical hole) with actual dimension of 59.998 mm is inspected with a brand new limit gauge designed with the tolerances as shown below, what would be the outcome of the inspection?