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Chapter 1 Overview and Descriptive Statistics
FillintheBlank Questions
1.
A welldefined collection of objects constitutes a __________ of interest.
2.
Certain characteristics of the objects in a population may be __________ such as type of malfunction or it
may be __________ such as age of a graduating engineer.
3.
A __________ is any characteristic whose value may change from one object to another in the population.
4.
__________ statistics involves summarizing and describing important features of the data.
5.
Techniques for using sample information to draw dependable conclusions about the population are gathered
within the branch of statistics called __________ statistics.
6.
An __________ study is broadly defined as one that is not enumerative in nature.
7.
The number of observations in a single sample, denoted by
n
, is referred to as the __________.
8.
In a stemandleaf display, the __________ digit(s) is (are) the stem(s), whereas the __________ digit(s) is
(are) the leaf (or leaves).
9.
A __________ plot combines a timeseries plot with a stemandleaf display.
10.
A __________ variable
x
almost results from counting, in which case possible values are 0, 1, 2,….
. or
some subset of these integers.
11.
The number of traffic citations a person received during the last year is not an example of a __________
variable.
12.
A histogram is __________ if the left half is a mirror image of the right half.
13.
Just as
x
represents the average value of the observations in a sample, the average of all values in the
population is represented by the Greek letter __________ .
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View Full Document14.
The median of the data set 8, 20, 18, 8, 9, 16, 10, and 12 is __________.
15.
A 5% trimmed mean would be computed by eliminating the smallest__________% and the largest
__________% of the sample values, and then averaging the remaining data values.
16.
If a sample of 100 computer owners reveals that 32 owned their computer at least 3 years, then we might
use __________ as a point estimate of the proportion of all owners who have owned their computer at least
3 years.
17.
The __________, __________, and __________ are the three most common measures of location.
18.
The simplest measure of __________ in a sample is the __________, which is the difference between the
largest and smallest sample values.
19.
Sum of the deviations from the mean; namely
(
),
n
i
i i
x
x
=

∑
is always __________.
20.
The __________ __________ is always the positive square root of the variance.
21.
The sample variance of the data set 5,5,5,5, and 5 is __________.
22.
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 Spring '11
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