What are the requirements that must be satisfied for a sample to be random? Check all that apply. a. Each individual has an equal chance of being selected. b. The proportions of all subgroups in the sample are equal to their proportions in the population. c. If more than one individual is selected, the probabilities stay constant for each individual selected. d. The sample is drawn without replacement.

The requirement that must be satisfied for a sample to be random is " Each individual has an equal chance of being selected "

Step-by-step explanation:

The requirement that must be satisfied for a sample to be random is " Each individual has an equal chance of being selected "Therefore option a) " Each individual has an equal chance of being selected " is correctSimple random sampling is a method used to cull a smaller sample size from a larger population The uses of a simple random sample is easy to use and it is used in the accurate representation of the larger population

A: 18/15b : 7 - -8 = 15 , 12 - -6 = 18 the y variable always goes over the x variables, c : same thing a