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If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

which of the following sets of data would produce the largest value for an independent-measures t statistic? the two sample means are 10 and 20 with variances of 20 and 25 the two sample means are 10 and 20 with variances of 120 and 125 the two sample means are 10 and 12 with sample variances of 20 and 25 the two sample means are 10 and 12 with variances of 120 and 125

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?