Reference no: EM131341892
Again using the cumulative frequency distribution arrived at in Problem 1, determine
a. The percentile rank of a score of 275
b. The percentile rank of a score of 318 biological
Problem 1
Convert the grouped frequency distribution of rat weights determined in Problem 2 to a relative frequency, cumulative frequency, and cumulative percentage distribution. biological
Problem 2
The psychology department of a large university maintains its own vivarium of rats for research purposes. A recent sampling of 50 rats from the vivarium revealed the following rat weights:
a. Construct a frequency distribution of grouped scores with approximately 11 intervals.
b. Construct a histogram of the frequency distribution constructed in part a.
c. Is the distribution symmetrical or skewed?
d. Construct a stem and leaf diagram with the last digit being a leaf and the first two digits a stem. Do not repeat stem values.
e. Which diagram do you like better, the histogram or the stem and leaf diagram? Why?
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