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  2. Clustered standard errors - Wikipedia

    en.wikipedia.org/wiki/Clustered_standard_errors

    A useful mathematical illustration comes from the case of one-way clustering in an ordinary least squares (OLS) model. Consider a simple model with N observations that are subdivided in C clusters.

  3. Utility frequency - Wikipedia

    en.wikipedia.org/wiki/Utility_frequency

    Utility frequency. The utility frequency, (power) line frequency ( American English) or mains frequency ( British English) is the nominal frequency of the oscillations of alternating current (AC) in a wide area synchronous grid transmitted from a power station to the end-user. In large parts of the world this is 50 Hz, although in the Americas ...

  4. List of star systems within 50–55 light-years - Wikipedia

    en.wikipedia.org/wiki/List_of_star_systems_within...

    This is a list of star systems within 50-55 light years of Earth . Star system. Median distance ( ly ) Stars in system. Spectral type. Apparent magnitude (V) Comments and references. Delta Aquilae.

  5. WRAZ (TV) - Wikipedia

    en.wikipedia.org/wiki/WRAZ_(TV)

    WRAZ. /  35.67472°N 78.52750°W  / 35.67472; -78.52750  ( WRAZ) WRAZ (channel 50), branded Fox 50, is a television station licensed to Raleigh, North Carolina, United States, serving as the Fox affiliate for the Research Triangle area. It is locally owned by the Capitol Broadcasting Company alongside NBC affiliate WRAL-TV (channel 5 ...

  6. 50th parallel north - Wikipedia

    en.wikipedia.org/wiki/50th_parallel_north

    The 50th parallel north is a circle of latitude that is 50 degrees north of the Earth's equatorial plane. It crosses Europe, Asia, the Pacific Ocean, North America, and the Atlantic Ocean . At this latitude the sun is visible for 16 hours, 22 minutes during the summer solstice and 8 hours, 4 minutes during the winter solstice. [ 1]

  7. 50–40–90 club - Wikipedia

    en.wikipedia.org/wiki/50–40–90_club

    During his second stint with the Phoenix Suns, Steve Nash achieved the 50-40-90 feat in four separate seasons, the most of any player.. The 50–40–90 club is a statistical achievement used to distinguish players as excellent shooters in the National Basketball Association (NBA), NBA G League, Women's National Basketball Association (WNBA), and men's college basketball.

  8. WPWR-TV - Wikipedia

    en.wikipedia.org/wiki/WPWR-TV

    WPWR-TV. /  41.878917°N 87.636167°W  / 41.878917; -87.636167. WPWR-TV (channel 50) is a television station licensed to Gary, Indiana, United States, broadcasting the MyNetworkTV programming service to the Chicago area. It is one of two commercial television stations in the Chicago market to be licensed in Indiana (alongside independent ...