Consider a two-way frequency table. Which of the following statements are true? Select all that apply.
A. The sum of all joint frequencies in a column equals the marginal frequency at the bottom of the column.
B. The sum of all joint frequencies equals the total frequency.
C. The sum of all marginal frequencies equals the total frequency.
D. A relative frequency is the ratio of a joint frequency and a marginal frequency.
E. The sum of all marginal frequencies in a row equals the total frequency.

17 in long 1.3 ft wide and 8in high what is the volume

Aprisoner is trapped in a cell containing three doors. the first door leads to a tunnel that returns him to his cell after two days of travel. the second leads to a tunnel that returns him to his cell after three days of travel. the third door leads immediately to freedom. (a) assuming that the prisoner will always select doors 1, 2 and 3 with probabili- ties 0.5,0.3,0.2 (respectively), what is the expected number of days until he reaches freedom? (b) assuming that the prisoner is always equally likely to choose among those doors that he has not used, what is the expected number of days until he reaches freedom? (in this version, if the prisoner initially tries door 1, for example, then when he returns to the cell, he will now select only from doors 2 and 3.) (c) for parts (a) and (b), find the variance of the number of days until the prisoner reaches freedom. hint for part (b): define ni to be the number of additional days the prisoner spends after initially choosing door i and returning to his cell.

Is of - 4x + 2? a. 3 b. 4 c. 6 d. 5