Question

Which of the following is NOT correct?

a. After a company conducted a survey to measure customer satisfaction ranking from 1-5, the company can use a P-chart to track the average satisfaction for future samples.
b. For the last 30 days, a research lab assistant has measured the temperature of the specimen in a scientific experiment, ranging from -30 to 100 degree Celsius. Equipped with this data, the lab assistant can now use an X-bar chart to track the average temperature for future samples.
c. A fishbone diagram is also called an Ishikawa diagram.
d. A cause and effect diagram is also called an Ishikawa diagram

Answer 1

Statement (A) is NOT correct.

Step-by-step explanation:

(A) This statement is not correct.

A P-chart is basically used to control or check for odd situations or defective items in a group. In this case (or statement), nothing represents defectiveness, instead the company wants to check for average satisfaction in future samples.

(B) This statement is correct.

Time frame = 30 days; Temperature range = -30°C - 100°C

So the lab assistant measured the temperature of the specimen for each of the 30 days. The recorded data can be used to track the average temperature for future samples of that specimen. X-bar charts are used to track the mean or average of processes that occur within a time frame; from the present time to a future time or from a given specimen to another.

(C) Correct.

Another name for fishbone diagram is Ishikawa Diagram. This diagram comes in the shape of a fish.

(D) Correct.

Another name for Cause & Effect Diagram is Ishikawa Diagram. This simple diagram is used to show the causes of a phenomenon and the effects of same phenomenon.