A stem and leaf plot is useful for keeping more precision than a grouped frequen

Question

A stem and leaf plot is useful for keeping more precision than a grouped frequency distribution. True or False.

The mode of a set of data can be computed only when the data is numeric. True or False.

One normal curve has mean 23 and standard deviation 1, a second normal curve has mean 5 and standard deviation 10. The curve that is more dispersed, or spread out, is
a.The first normal curve
b.The second normal curve
c.They are equally spread out
d.There is insufficient information to answer the question


A multiple choice quiz consists of 6 questions, each with 4 possible answers. If a student guesses at the answer to each question, then the mean number of correct answers is
A) 6.00 B) 1.50 C) 4.00 D) 10.00

Explanation / Answer

false. http://www.uwsp.edu/psych/stat/3/frqdist.htm. It's just not more precise. B. SD^2 is a measure of variance. 10^2 > 1^2. 1.5. You should get one in 4 right (since there are 4 answers) 6*1/4=1.5

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