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If the redshift of a quasar were 3, at what wavelength would the 486.1-nm line of hydrogen appear in the quasar's spectrum
Variances
Statistical measures of the dispersion of data points in a dataset, indicating how far each data point in the set is from the mean.
Portfolio
A portfolio of investment vehicles, including equities, fixed income, raw materials, money, and money-like assets, along with mutual funds and ETFs.
Covariance
A measure indicating the extent to which two variables change in tandem.
Variances
Statistical measures that represent the extent to which a set of numbers is spread out from their average value.
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Q92: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TBX8927/.jpg" alt=" The relative abundance