The Following Data Are Test Grades for a University Business

question 17

Essay

The following data are test grades for a university business statistics class. $$\begin{array} { | r | r | r | r | r | r | r | r | r | r | } \hline 63 & 74 & 42 & 65 & 51 & 54 & 36 & 56 & 68 & 57 \\\hline 62 & 64 & 76 & 67 & 79 & 61 & 81 & 77 & 59 & 38 \\\hline 84 & 68 & 71 & 94 & 71 & 86 & 69 & 75 & 91 & 55 \\\hline 48 & 82 & 83 & 54 & 79 & 62 & 68 & 58 & 41 & 47 \\\hline\end{array}$$ a. Construct a cumulative frequency distribution and a cumulative relative frequency distribution for the data.
b. What proportion of the grades is less than 60?
c. What proportion of the grades is more than 70?

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Definitions:

Correlated

A statistical relationship indicating that two variables move in relation to each other, either positively or negatively.

Relationship

How two or more entities, things, or persons relate to each other, or their state of linkage.

Predict

To declare or indicate an event, condition, or result in the future, typically based on observation, experience, or scientific reasoning.

Representative Sample

A smaller portion of a population that accurately represents the characteristics of the whole population.