Can a measure be reliable but not valid or vice versa

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Imagine that your local grocery store has a scale at the exit door that people can weigh themselves on as they exit the stor. Every Tuesday at 5 pm in your time zone you pass by the scale and weigh yourself. Each week the scale tells you the same thing: it registers your weight as 5 pounds heavier than you know your true weight to be. Other patrons step on the scale and report the same result (that the scales shows them as 5 pounds heavier than their true weight).

Question 1: Is the scale reliable? Why or why not?

Question 2: Is the scale valid? Why or why not?

Question 3: Can a measure be reliable but not valid, or vice versa (valid but not reliable)?

Reference no: EM132857769

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