The Following Data Represent the Scores of 50 Students on a Statistics

question 77

Essay

The following data represent the scores of 50 students on a statistics exam. Suppose that one of the 50 students is chosen at random and that student's score is noted.
$$\begin{array} { l l l l l l l l l l } 39 & 51 & 59 & 63 & 66 & 68 & 68 & 69 & 70 & 71 \\71 & 71 & 73 & 74 & 76 & 76 & 76 & 77 & 78 & 79 \\79 & 79 & 79 & 80 & 80 & 82 & 83 & 83 & 83 & 85 \\85 & 86 & 86 & 88 & 88 & 88 & 88 & 89 & 89 & 89 \\90 & 90 & 91 & 91 & 92 & 95 & 96 & 97 & 97 & 98\end{array}$$ a. What is the probability that the student's score is 88?
b. What is the probability that the student's score is less than 60?
c. What is the probability that the student's score is between 70 and 79, inclusive?

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Definitions:

Longitudinal

A research design in which the same subjects are observed or tested repeatedly over a period of time.

Correlational

Referring to a type of research design that examines the relationship between two or more variables to determine if they are associated in some way.

Longitudinal Research

A research design that involves repeated observations of the same variables over a period of time, extending from months to years.

Cross-Sectional

This observational study method examines data collected from a whole population or a selected portion of it at one specific time.