How do I insert a sum symbol in Word?

How do I insert a sum symbol in Word?

The symbol’s code: You can insert symbols by typing the symbol’s code and then pressing the Alt+X key combination. For example, the code for the sigma character is 2211: Type 2211 in your document and then press Alt+X. The number 2211 is magically transformed into the sigma character.

What does Sigma P Hat mean?

standard deviation

How do I find my UCL?

Calculate the X-bar Chart Upper Control Limit, or upper natural process limit, by multiplying R-bar by the appropriate A2 factor (based on subgroup size) and adding that value to the average (X-bar-bar). UCL (X-bar) = X-bar-bar + (A2 x R-bar) Plot the Upper Control Limit on the X-bar chart.

What does the Greek letter U stand for in statistics?

μ refers to a population mean; and x, to a sample mean. σ refers to the standard deviation of a population; and s, to the standard deviation of a sample.

How do you find the P chart?

The subgroup size is n = 100. The p values for each subgroup (day) have been calculated and are shown in the table. For example, for day 1, there were 22 defective items (np) found in the 100 invoices inspected. Thus, p = np/n = 22/100 = 0.22 or 22%.

What is P chart and C-chart?

A p-chart is used to record the proportion of defective units in a sample. A c-chart is used to record the number of defects in a sample.

What does the P in P chart stand for?

the proportion of successes

What is C-chart used for?

A c-chart is an attributes control chart used with data collected in subgroups that are the same size. C-charts show how the process, measured by the number of nonconformities per item or group of items, changes over time. Nonconformities are defects or occurrences found in the sampled subgroup.

Why we use P chart?

A p-chart is an attributes control chart used with data collected in subgroups of varying sizes. P-charts are used to determine if the process is stable and predictable, as well as to monitor the effects of process improvement theories.

What is P chart and NP chart?

p and np control charts are used with yes/no type attributes data. These two charts are commonly used to monitor the fraction (p chart) or number (np chart) of defective items in a subgroup of items. Each week you calculate the fraction defective, p, which is equal to np/n. The values of p are plotted over time.