the manager of a machine shop wants to create an srs of 20 parts to check for defects in the parts coming…

the manager of a machine shop wants to create an srs of 20 parts to check for defects in the parts coming off an assembly line. she selects every other part that comes off the line until she has selected a total of 20 parts. which statements are true? check all that apply. the sample is a random sample. the sample is an srs. the sample is not a random sample. there are restrictions placed on the sample. each part has an equal chance of being selected.

the manager of a machine shop wants to create an srs of 20 parts to check for defects in the parts coming off an assembly line. she selects every other part that comes off the line until she has selected a total of 20 parts. which statements are true? check all that apply. the sample is a random sample. the sample is an srs. the sample is not a random sample. there are restrictions placed on the sample. each part has an equal chance of being selected.

Answer

Answer:

  • The sample is not a random sample.
  • There are restrictions placed on the sample.

Brief Explanations:

Selecting every other part is a systematic - not random - selection method. This creates a restriction as parts are chosen based on a fixed pattern, not randomly, so each part does not have an equal chance of being selected in the way that is required for a simple random sample (SRS).