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Osbert12
Osbert12, Master's Degree
Category: Math Homework
Satisfied Customers: 2908
Experience:  Statistics
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Math homework Questions

Customer Question

What is the level of measurement for each of the following variables?
a. Student IQ ratings
b. Distance students travel to class
c. The jersey numbers of a sorority soccer team
d. A classification of students by state of birth
e. A ranking of students as freshmen, sophomore, junior, and senior
f. Number of hour’s students study per week
Submitted: 4 years ago.
Category: Math Homework
Expert:  jkcpa replied 4 years ago.
1. Student IQ ratings. Interval-Level
2. Distance students travel to class. Ratio-Level
3. The jersey numbers of a sorority soccer team. Nominal-Level
4. A classification of students by state of birth. Nominal-Level
5. A ranking of students as freshman, sophomore, junior, and senior. Ordinal-Level
6. Number of hour’s students study per week. Ratio-Level
Customer: replied 4 years ago.
1. A set of data contains 53 observations. The lowest value is 42 and the largest is 129. The data are to be organized into a frequency distribution.
(a) How many classes would you suggest?
(b) What would you suggest as the lower limit of the first class?
Expert:  Osbert12 replied 4 years ago.
First I will mention that there are not unique answers for your questions. The number of classes is generally set between 5 and 20. Since 53 observations are relatively small, I would set the number of classes to be a relatively small number, such as 7. This will yield an average of approximately 8 observations per class.
I would set the lower limit of the first class at 40.
(a) 7
(b) 40