All Nine Planets in the Solar System Have Been Visited

question 80

True/False

All nine planets in the solar system have been visited by spacecraft.

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Definitions:

Means

Means refer to the average values of sets of data, calculated by summing all values and dividing by the number of data points.

≠ 0

Symbol indicating that a quantity or difference is not equal to zero, often used in hypotheses testing to signify a non-null effect.

Standard Error

The standard deviation of the sampling distribution of a statistic, often used to estimate the accuracy of sample mean as an approximation of the population mean.