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In statistics, the mean squared error or mean squared deviation of an estimator measures the average of the squares of the errors—that is, the average squared difference between the estimated values and the actual value. MSE is corresponding to the expected value of the squared error loss; the fact that MSE is always positive is because of randomness or because the estimator does not account for information that could produce a more accurate estimate. The MSE is a measure of the quality of an estimator—it is always non-negative, values closer to zero are better; the MSE is the second moment of the error, thus incorporates both the variance of the estimator and its bias. For an unbiased estimator, the MSE is the variance of the estimator. Like the variance, MSE has the same units of measurement as the square of the quantity being estimated. In an analogy to standard deviation, taking the square root of MSE yields the root-mean-square error or root-mean-square deviation, which has the same units as the quantity being estimated.

The MSE assesses the quality of an estimator. The definition of an MSE differs according to whether one is describing an estimator. If a vector of n predictions generated from a sample of n data points on all variables, Y is the vector of observed values of the variable being predicted, with Y i ^ being the predicted values the within-sample MSE of the predictor is computed as MSE = 1 n ∑ i = 1 n 2. I.e. the MSE is the mean of the squares of the errors 2. This is an computable quantity for a particular sample; the MSE can be computed on q data points that were not used in estimating the model, either because they were held back for this purpose or because these data have been newly obtained. In this process, known as cross-validation, the MSE is called the mean squared prediction error, is computed as MSPE = 1 q ∑ i = n + 1 n + q 2; the MSE of an estimator θ ^ with respect to an unknown parameter θ is defined as MSE ⁡ = E θ ⁡. This definition depends on the unknown parameter, but the MSE is a priori a property of an estimator.

The MSE could be a function of unknown parameters, in which case any estimator of the MSE based on estimates of these parameters would be a function of the data and thus a random variable. If the estimator θ ^ is derived as a sample statistic and is used to estimate some population parameter the expectation is with respect to the sampling distribution of the sample statistic; the MSE can be written as the sum of the variance of the estimator and the squared bias of the estimator, providing a useful way to calculate the MSE and implying that in the case of unbiased estimators, the MSE and variance are equivalent. MSE ⁡ = Var θ ⁡ + Bias ⁡ 2. MSE ⁡ = E θ ⁡ [ (

Pamela Merritt is an American writer and activist who advocates for women's rights and against White Supremacy. Merritt is a co-founder and co-director with Erin Matson at Reproaction, an reproductive justice organization that works to increase access to abortion, expose deceptive practices at pregnancy crisis centers, improve infant and maternal death rates. Merritt advocates for recruiting and training more doulas and midwives to improve birth mortality rates, she has published thousands of articles on racism and gender, been featured on several national websites for her activism and expertise, including on the Washington Post, NPR, Rolling Stone and the Huffington Post. Merritt receives violent sexual threats in response to her work, is harassed extensively online on social media, she says she reports the most threatening incidents to the police, was once warned by the FBI about a white supremacist trying to find her home address, forcing her to change her online habits. Merritt is a board member for NARAL.

She has spoken out against Donald Trump. She grew up in St. Louis and before becoming an activist worked for a St. Louis newspaper

David Robert Madison Genn is a Canadian musician and songwriter. He is a member of the rock group 54-40, a former member of the Matthew Good Band. Genn was born in Vancouver, British Columbia, on 2 March 1969, he is the son of artist G Robert Genn. Dave Genn was a member of Vancouver psychedelic, hard rock, band Dead Surf Kiss, named after their love of The Grateful Dead, Surf music, KISS, they had several releases the first of, titled "Narcotic Nevada" via Vancouver label "Onslot Music" in 1991. The album was produced by Dan Tanna. "Onslot Music" signed a sub-distro deal in the USA with BMG Music. They played shows at Vancouver's Town Pump Cabaret. DSK was the opening act for BMG label-mates TOOL on their North American tour, in the early 1990s. Genn spent six years with the Matthew Good Band between 1995 and 2001 when he served as the band's lead guitarist and keyboardist, co-writing many of the band's songs with Matthew Good. Genn joined the band 54-40 in 2003; as of 2019 he continues to record with the group.

In February 2006, Genn married local CTV Vancouver news anchor/TV personality Tamara Taggart. Genn has two daughters. 54-40 homepage

Nicole Nadra Baukus is an American woman convicted of two counts of vehicular manslaughter stemming from an accident on June 29, 2012, in which she was driving intoxicated. Baukus pleaded guilty to the charges and was sentenced to 38 years in prison with the possibility of parole. Highway surveillance cameras showed Baukus' vehicle traveling on the wrong side of Interstate 45 after she had consumed alcohol at a nearby bar. A request for a new trial was denied. Nicole Baukus graduated from Oak Ridge High School in Conroe, Texas. Baukus was charged with two counts of second-degree felony intoxication manslaughter and one count of third-degree felony intoxication assault. After pleading not guilty to the charges against her, she pleaded guilty to two counts of vehicular manslaughter on August 1, 2013. Baukus was sentenced to a maximum of 15 years in prison on each count, she is eligible for parole in 2021. The judge in her trial, Michael Seiler, resigned from the bench to avoid prosecution from matters unrelated to this case.

Baukus filed an appeal of her conviction, denied with a dissenting opinion in the Texas 9th District Court of Appeals. She filed a Petition for Discretionary Review with the Texas Court of Criminal Appeals, refused. On September 11, 2017, Ms. Baukus filed a writ of habeas corpus in the 435th District Court of Montgomery County, Texas with allegations of police misconduct, planting of evidence, prosecutorial misconduct, ineffective assistance of her trial lawyer; the case is now pending before the Texas Court of Criminal Appeals

Die Scheinheiligen, or The Hypocrites, is a German low-budget comedy film and directed by Thomas Kronthaler and based on a true incident in his hometown of Irschenberg. It became popular in Bavarian cinemas; the local government of Irschenberg are planning the construction of a motorway exit with a fast-food restaurant, for which they need the property of Magdalena Trenner, a rich old woman, unpopular in the village until she takes in a traveling carpenter, an asylum seeker named Theophile. With their help she regains popularity among the villagers and prevents the mayors numerous plots to get his hands on her land from succeeding; when she dies the mayor thinks he has won, but Johannes tricks them into believing she left a will leaving her entire property to the local scouts. A fight starts at the end. Maria Singer as Magdalena Trenner Johannes Demmel as Johannes Michael Emina as Theophile Andreas Lechner as the priest Werner Rom as the mayor Wolfgang Fischer as policeman Bene Die Scheinheiligen on IMDb

Østerport Station is a main line and S-train railway station in Copenhagen, Denmark. It is located between the districts of Indre By and Østerbro, is named for the historic Østerport city gate, near the original location of which it is located; the station is served by EuroCity services to international destinations, some InterCity services across Denmark and frequent regional train services to and from Zealand and southern Sweden, as well as commuter rail services on the S-train network. As of 29 September 2019, Østerport is served by the Copenhagen Metro City Circle Line and future; the station opened in 1897 as the terminus of the Coast Line from Copenhagen to Helsingør. The station is used by 30,000 passengers each day; the station was designed by Heinrich Wenck and built in 1897, named the East Station. The original station building has survived to the present date, was restored in the 1980s, it was the terminus for the Coast Line, but when the station was connected with Nørreport Station via the Boulevard Line in 1917, the terminus moved to Copenhagen Central Station.

In 1934, the station started serving S-trains. The station is served by EuroCity services to international destinations, some InterCity services across Denmark and frequent regional train services to and from Zealand and southern Sweden, as well as commuter rail services on the S-train network. By 2019, the service was included the Copenhagen Metro as well; the Copenhagen Metro line M3 on the City Circle Line serves. The metro station is located under the street Østbanegade with the staircase towards Østerport station. Another line M4 will supplement line M3, going to Nordhavn and Ny Ellebjerg. A subway between the metro platforms to Østerport station is planned in the future. Østerport station is seen at 1:24:15 and again at 1:24:48 /track 5/) in the 1975 Olsen-banden film The Olsen Gang on the Track. Description on DSB site