The symbol for the variance of a population is: s² (b) (c) µ (d) s (e) ² Which m
ID: 3238069 • Letter: T
Question
The symbol for the variance of a population is:
s² (b) (c) µ (d) s (e) ²
Which measure of central tendency can be misleading when a data set contains outliers?
(a) Mean (b) Mode (c) Median (d) Range (e) All of the above
The number of data values in a population is represented by:
N (b) (c) n (d) µ (e)
The ____ is the value that occurs with the greatest frequency
(a) Mean (b) Median (c) Mode (d)Mid-Range
Questions 16 – 23 pertain to the following data below.
17 19 21 18 20 18 19 20 20 21
What is the mean?
(a) 19.9 (b) 20.4 (c) 19.3 (d) 18.6
What is the median?
19.0 (b) 19.5 (c) 20.0 (d) 18.7
What is the mode?
18 (b) 19 (c) 21 (d) 20
What is the mid-range?
20 (b) 21 (c) 19 (d) 18
What is the standard deviation?
1.8 (b) 1.3 (c) 1.7 (d) 19.3
What is the variance?
1.2 (b)1.3 (c)1.7 (d)1.4
Find the value of Q1
18 (b) 19 (c) 20 (d) 21
Find the value of Q3?
18 (b) 19 (c) 20 (d) 21
Which has a better relative position: a score of 75 on a Statistics test with a mean of 60 and a standard deviation of 10 or a score of 36 on a Biology test with a mean of 30 and a variance of 16?
Statistics (b) Biology (c) Both are the same (d) Cannot be determined
True or False. For any data set, the median is always equal to the 50th percentile
True (b) False
If the standard deviation of a data set is 5.0, what is the variance?
2.5 (b) 2.24 (c) 25.0 (d) 250.0 (e) 10
Questions 27 – 30 pertain to the following: The US Military, when designing a new fighter jet must consider the sitting heights of airforce pilots. Listed below are the sitting heights (in millimeters) obtained from a random sample of pilots.
936, 928, 924, 880, 934, 923, 878, 930, 936
What is the mean of the sample values?
907 (b) 918.8 (c) 936.8 (d) 928
What is the median of the sample values?
Explanation / Answer
1 . Symbol of variance of population is given by e)
2. C. Median can be misleading because it is unaffected by outliers
3. a) N is the total number from population
4. c) mode occurs with highest frequency
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