Given that y varies directly as x and inversely as 2m-1 and that y =5 when x=7and m=4, calculate of variation k

Answer this question! 30 points and brainliest! only if you know the answer.

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

According to the data set, where should the upper quartile line of the box plot be placed?