j \.Vhat has the letter 11 bee n used to reiwcsen• • , . . . ,
" 111 "111 s slnL1sL1cs counw?
@ Sample Si ze
B Population Size
C Normal Distributio n
D Number of Variables
E None of the other a nswers a re correct .
Suppose we measure t he height of 5 elephants in inches. The observed values were the following:
102 , 106, 104 , 109, 110
What type of varia ble is t he height of an elephant?
~ Numeric Discrete
@ Numeric Continuou s
~Categorica l Nominal
&_catego rical Ordinal
E More informatio n is neede<l to answer this quest ion.
Suppose we collect the t-shirts sizes of 9 students. T he observed values were the following :
Small, Medium, Small, Extra Small, Extra Large, Large, Large, Small, Medium
What type of variable is t-shirt size?
A Numeric Discrete
B Numeric Continuou s
C Categorica l ,Nominal.
@ C ategorical Qrdinal
E More informatio n is needed to answer this question .
Which of the following statistics are robust?
~ Sample Mean
(B) IQR
Ji Sample Standa rd Deviation
'h:., l\,Jaximum
E None of t he following statistics a re considered lo be robust
1-'agr 2
, Is. 8Plow are the dnss siz1•s of 9 rnndomly sclt:ded upper-level nmtli wurses:
" What is Q 1 of these 9 class sizes?
A 15
B 16
C 30
D 35
Q0 None of the other answers are correct 1r.5 32 Y
j_ 'i'he equation of a fitted <egc=ion line foe pcedicting the a""cage annual tempecatu<e (deg,-ees Ce~ius)
given t he elevation ( meters above sea level) ls the following :
,,,--. ...._
y = 20 - 0.006j
Also , t he R 2 for this linear regression was 0.25. What was the correlation between the average annual
temperature a nd the elevation fro m the dataset t hat was used to fit this linear regression?
A 0.25
B 0.5
C -0.006
~ 0.5
E More information is needed to answer t his question
Suppose we randomly sample 30 high school students from Braxton High School to participate in a study
designed to compare the effectiveness of two math teachers , Mark and Betsy. We give all 30 students a
math test at the beginning of the school year. Then , we randomly assign 15 students to be in Mark's
math course and randomly assign 15 to be in Betsy 's math course. At the end of the school year, we
make all 30 take a math test, similar to the one taken before instruction began, to estimate improvement.
What type of study is this?
A Observational
®Experimental
~ Anecdotal
D Para.normal
E None of the other answers a.re correct
" 111 "111 s slnL1sL1cs counw?
@ Sample Si ze
B Population Size
C Normal Distributio n
D Number of Variables
E None of the other a nswers a re correct .
Suppose we measure t he height of 5 elephants in inches. The observed values were the following:
102 , 106, 104 , 109, 110
What type of varia ble is t he height of an elephant?
~ Numeric Discrete
@ Numeric Continuou s
~Categorica l Nominal
&_catego rical Ordinal
E More informatio n is neede<l to answer this quest ion.
Suppose we collect the t-shirts sizes of 9 students. T he observed values were the following :
Small, Medium, Small, Extra Small, Extra Large, Large, Large, Small, Medium
What type of variable is t-shirt size?
A Numeric Discrete
B Numeric Continuou s
C Categorica l ,Nominal.
@ C ategorical Qrdinal
E More informatio n is needed to answer this question .
Which of the following statistics are robust?
~ Sample Mean
(B) IQR
Ji Sample Standa rd Deviation
'h:., l\,Jaximum
E None of t he following statistics a re considered lo be robust
1-'agr 2
, Is. 8Plow are the dnss siz1•s of 9 rnndomly sclt:ded upper-level nmtli wurses:
" What is Q 1 of these 9 class sizes?
A 15
B 16
C 30
D 35
Q0 None of the other answers are correct 1r.5 32 Y
j_ 'i'he equation of a fitted <egc=ion line foe pcedicting the a""cage annual tempecatu<e (deg,-ees Ce~ius)
given t he elevation ( meters above sea level) ls the following :
,,,--. ...._
y = 20 - 0.006j
Also , t he R 2 for this linear regression was 0.25. What was the correlation between the average annual
temperature a nd the elevation fro m the dataset t hat was used to fit this linear regression?
A 0.25
B 0.5
C -0.006
~ 0.5
E More information is needed to answer t his question
Suppose we randomly sample 30 high school students from Braxton High School to participate in a study
designed to compare the effectiveness of two math teachers , Mark and Betsy. We give all 30 students a
math test at the beginning of the school year. Then , we randomly assign 15 students to be in Mark's
math course and randomly assign 15 to be in Betsy 's math course. At the end of the school year, we
make all 30 take a math test, similar to the one taken before instruction began, to estimate improvement.
What type of study is this?
A Observational
®Experimental
~ Anecdotal
D Para.normal
E None of the other answers a.re correct
