Question
6) [True or False] Standard deviation can be negative. A) TRUE B) FALSE 7. A random...
6) [True or False] Standard deviation can be negative.
A) TRUE
B) FALSE
7. A random sample of 40 college professors is selected
from all professors at a university.
The following list contains their ages.
65, 45, 44, 38, 55, 55, 49, 42, 43, 22, 52, 58, 52, 38,
56, 34, 53, 36, 50, 36
34,
68, 43, 56, 37, 35, 28, 30, 26, 26, 53, 30, 37, 55,
28, 39, 26, 31, 37, 50
Z score for 55 is?
Homework Answers
Answer #1
6) The minimium value of standard deviation can be 0 as it does not given any diection sense in its value. It only gives us an absolute measure of spread. Therefore the given statement is False here.
7) For the given set of values, the sample mean is computed first here as:
Using this the sample standard deviation here is computed as:
Therefore the z score for x = 55 score is computed here as:
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