# What is a PPM meeting?

## What is a PPM meeting?

A PLO (Public law outline meeting) or PPM (Pre-Proceedings Meeting) is a meeting called by the Local Authority when they have concerns surrounding your care of your child/children. The meeting is an opportunity for the Local Authority to make you aware of the concerns they have about your child/children.

### How many ppm is Six Sigma?

3.4

#### How many ppm is 1.33 Cpk?

Sigma level table

Two sided table | ||
---|---|---|

Cpk Ppk | Sigma level | PPM out of tolerance |

1.33 | 4.0 | 63.342 |

1.50 | 4.5 | 6.795 |

1.67 | 5.0 | 0.573 |

**What percent is 4 sigma?**

Don’t be so sure

σ | Confidence that result is real |
---|---|

2.5 σ | 99.38% |

3 σ | 99.87% |

3.5 σ | 99.98% |

> 4 σ | 100% (almost) |

**What percentage is 7 sigma?**

0.0000019%

## What percentage is 6 Sigma?

99.99966%

### How much is 2 standard deviations?

For an approximately normal data set, the values within one standard deviation of the mean account for about 68% of the set; while within two standard deviations account for about 95%; and within three standard deviations account for about 99.7%.

#### How much is 4 standard deviations?

99.7% of the population is within 3 standard deviations of the mean. 99.9% of the population is within 4 standard deviations of the mean.

**What is two standard deviations above IQ?**

13.59% of the population is between the first and second standard deviation below the mean (IQ 70-85), and 13.59% is between the first and second standard deviation above the mean (IQ 115-130).

**How is SDOM calculated?**

The Math / Science The standard deviation of the mean (SDOM) is the standard deviation divided by the square root of the number of samples. The SDOM is sometimes also known as the standard error of the mean (SEM). This quantity is useful in that it helps quantify the uncertainty in the estimate of the mean.

## What is meant by 2 standard deviations?

Specifically, if a set of data is normally (randomly, for our purposes) distributed about its mean, then about 2/3 of the data values will lie within 1 standard deviation of the mean value, and about 95/100 of the data values will lie within 2 standard deviations of the mean value. …

### How do we calculate standard error?

SEM is calculated by taking the standard deviation and dividing it by the square root of the sample size. Standard error gives the accuracy of a sample mean by measuring the sample-to-sample variability of the sample means.

#### What is the formula to calculate standard deviation?

- The standard deviation formula may look confusing, but it will make sense after we break it down.
- Step 1: Find the mean.
- Step 2: For each data point, find the square of its distance to the mean.
- Step 3: Sum the values from Step 2.
- Step 4: Divide by the number of data points.
- Step 5: Take the square root.

**Why do we calculate standard deviation?**

Standard deviation measures the spread of a data distribution. The more spread out a data distribution is, the greater its standard deviation. Interestingly, standard deviation cannot be negative. A standard deviation close to 0 indicates that the data points tend to be close to the mean (shown by the dotted line).

**What is the symbol for standard deviation?**

σ

## What is the symbol of standard error?

σx̅

### What is M in statistics?

m (the greek letter “mu”) is used to denote the population mean. The population mean is worked out in exactly the same way as the sample mean: add all of the scores together, and divide the result by the total number of scores. In journal articles, the mean is usually represented by M, and the median by Mdn.

#### How do you know if a standard deviation is high or low?

Low standard deviation means data are clustered around the mean, and high standard deviation indicates data are more spread out. A standard deviation close to zero indicates that data points are close to the mean, whereas a high or low standard deviation indicates data points are respectively above or below the mean.