Can some solve for me step by step with explanation on how t

Can some solve for me step by step with explanation on how to get the answer. I am very weak in statistics and have no background. Deeply appreciated. Thanks

13. Systematic random samples are often used to choose a sample of apartments in a large building or dwelling units in a block at the last stage of a multistage sample. Like an SRS, a systematic sample gives all individuals the same chance to be chosen. Explain why this is true, then explain carefully why a systematic sample is nonetheless not a SRS.

Solution

An example will illustrate the idea of a systematic sample.

Suppose that we must choose 4 addresses out of 100.

Because 100/4 = 25, we can think of the list as four lists of 25 addresses.

Choose 1 of the first 25 addresses at random using Tables. The sample contains this address and the addresses 25, 50, and 75 places down the list from it. If the table gives 13, for example, then the systematic random sample consists of the addresses numbered 13, 38, 63, and 88

why a systematic sample is nonetheless not an SRS???

-------------ANSWER-----------

Every address has a 1-in-40 chance of being selected, but not every subset has an equal chance of being picked—for example, 01, 02, 03, 04, and 05 cannot be selected by this method.