The independent t ratio specifies how far the difference between the sample means deviated from
a. an assumed mean of 50, in units of standard deviations
b. an assumed mean of 100, in units of estimated standard errors of difference
c. an assumed mean of zero, in units of estimated standard errors of
difference
d. the standard deviation of the population
c
Psychology
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The perfect failure rate of the birth-control pill is ________ and the typical failure rate is ________
A) 0.1%; 20%. B) 1%; 10%. C) 0.5%; 3%. D) 10%; 30%.
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