Question: During a cold winter, the temperature stayed below zero for ten days.The range was -20 to -5. The variance of the temperatures: (is negative since

  1. During a cold winter, the temperature stayed below zero for ten days.The range was -20 to -5. The variance of the temperatures:

(is negative since all the numbers are negative OR must be at least zero OR cannot be computed since all the

numbers are negative ORcan be either negative or positive)

  1. If the mean of a distribution is negative(the standard deviation must also be negative ORthe variance must also be negativeORa mistake has been made in the computations, because the mean of a normal distribution can not be negative ORnone of these alternatives is correct)

  1. If two groups of numbers have the same mean, then(their standard deviations must also be equal OR their medians must also be equal ORtheir modes must also be equalORnone of these alternatives is correct)

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