Answer to Question #155528 in Statistics and Probability for Mty

Question

A)To find the level of measurement : nominal,ratio,interval and ordinal

1)Jason measures time on days, with 0 corresponding to his birth date. The day before his birth is -1, the day after his birth date is +1, and so on. Jason has converted dates of major historical events to his numbering systems. What is the level of measurement of these numbers?

2)Which is relatively better: A score of 85 on a chemistry test or a score of 45 on an physics test? Scores on the chemistry test have a mean of 90 and a standard deviation of 10. Scores on physics test have a mean of 55 and a standard deviation of 5

Answer 1

1) Ratio level.

2) For chemistry: $z=\frac{85-90}{10}=-0.5.$

For physics: $z=\frac{45-55}{5}=-2.$

Score on a chemistry is relatively better.