Which of the following random variables is geometric? The number of 1s in a row of 50 random digits. The number of tails when a coin is tossed 60 times. The number of digits in a randomly selected row until a 1 is found. The number of diamond cards obtained in a seven-card deal-out of a shuffled deck of 52 cards. The number of 1s when rolling a die 5 times.

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible

Solve the formula ax+ by = c for x.