,Fivestudents|received|the|followingtest|scores: |7,|11,|5,|6,|and|11.|Calculate|the|mode, |media |n,
|mean, |and |range |of |this |distribution of |scores. |Which |measure |of |central |tendency|would
a
|change |the |most |if |an additional |test |score |of |2 |were |included in |the |distribution?
a a
The table |lists |the |scores |of |eight students |on a test |to |measure |anxiety, |as |well |as |the |typical |nu
a a a a
|mber |of |cigarettes |each |person |smokes daily. |Scores |on |the |anxiety |test |can |range |anywhere
a
|from |a |low |of |0 |(indicating |verylow |anxiety) |to |a |high |of |30 |(indicating very|high |anxiety).
a
Anxiety Cigarettes
Student |Test|Score |Smoked|Daily
1 8 11
2 9 3
3 15 11
4 14 16
5 21 26
6 12 10
7 22 24
8 17 18
Construct |a |scatterplot to |represent |the |correlation between |smoking and anxiety. |Describ |e
a a a a
|the |direction |of |the |correlation |and |give |two possible |explanations |for |it.
a
At |Michigan |State University, |32 students |are |enrolled in class A, |48 |students are |enrolled |in
a a a a a a
|class |B, |and |16 |students |are |enrolled |in |class |C. |For |which |of |these |three |classes |is |there |t |he
|greatest |probability |that |more |than |75 |percent |of |the |students |have |blond |hair?
Explain |your |answer |and indicatewhythis |explanation |has |relevance |for |ge
a
|neralizing |appropriately |from |samples |to the |larger |populations |in which |you |are |interest
a a
|ed.
Page |1
,AnswerKey
|
1.
2.
3.
Page |2
, 1. The|average|price|fordifferent brandsof|toothpaste|could be|visuallydisplayed |in
a a a
| a(n)
correlation|coefficient.
|scatterplot.
|standard deviation.
a
| bar|graph.
2. When|you|read|a|bar|graph,|it|is|most|important|foryou|to
|mentallytransform |the |data |into a normal |curve.
a a
identifythe |value |of |the |standard deviation. |note
a
|the |range |and |size |of |the |scale |values. |remember
|that|correlation |facilitates |prediction.
3. The|most|frequently|occurring|scorein|a|distribution|of|scores|is|the
|mode.
median.
standard|deviation.
|mean.
4. In |a|group |of|five|individuals, |two|report annual |incomes |of|$10,000, |and |the|othe |r
a
|three |reportincomesof$14,000, |$15,000, |and$31,000, |respectively. |The |mode |of
|this |group's |distribution |of |annual |incomes |is
$10,000.
$15,000.
$16,000.
$31,000.
5. The|mean|of|a|distribution|of|scores|is|the
|most frequentlyoccurring score.
a a
|arithmetic average |of |all |the |scores.
a
least|frequentlyoccurring score.
a
score|exceeded by|50|percent |of|all |the|scores.
a
6. Which|measure|of|central|tendencyis|used to calculate|the|average|of|your|sc
a a
|hool|grades?
standard deviation
a
|median
mean
|mode
Page |1
|mean, |and |range |of |this |distribution of |scores. |Which |measure |of |central |tendency|would
a
|change |the |most |if |an additional |test |score |of |2 |were |included in |the |distribution?
a a
The table |lists |the |scores |of |eight students |on a test |to |measure |anxiety, |as |well |as |the |typical |nu
a a a a
|mber |of |cigarettes |each |person |smokes daily. |Scores |on |the |anxiety |test |can |range |anywhere
a
|from |a |low |of |0 |(indicating |verylow |anxiety) |to |a |high |of |30 |(indicating very|high |anxiety).
a
Anxiety Cigarettes
Student |Test|Score |Smoked|Daily
1 8 11
2 9 3
3 15 11
4 14 16
5 21 26
6 12 10
7 22 24
8 17 18
Construct |a |scatterplot to |represent |the |correlation between |smoking and anxiety. |Describ |e
a a a a
|the |direction |of |the |correlation |and |give |two possible |explanations |for |it.
a
At |Michigan |State University, |32 students |are |enrolled in class A, |48 |students are |enrolled |in
a a a a a a
|class |B, |and |16 |students |are |enrolled |in |class |C. |For |which |of |these |three |classes |is |there |t |he
|greatest |probability |that |more |than |75 |percent |of |the |students |have |blond |hair?
Explain |your |answer |and indicatewhythis |explanation |has |relevance |for |ge
a
|neralizing |appropriately |from |samples |to the |larger |populations |in which |you |are |interest
a a
|ed.
Page |1
,AnswerKey
|
1.
2.
3.
Page |2
, 1. The|average|price|fordifferent brandsof|toothpaste|could be|visuallydisplayed |in
a a a
| a(n)
correlation|coefficient.
|scatterplot.
|standard deviation.
a
| bar|graph.
2. When|you|read|a|bar|graph,|it|is|most|important|foryou|to
|mentallytransform |the |data |into a normal |curve.
a a
identifythe |value |of |the |standard deviation. |note
a
|the |range |and |size |of |the |scale |values. |remember
|that|correlation |facilitates |prediction.
3. The|most|frequently|occurring|scorein|a|distribution|of|scores|is|the
|mode.
median.
standard|deviation.
|mean.
4. In |a|group |of|five|individuals, |two|report annual |incomes |of|$10,000, |and |the|othe |r
a
|three |reportincomesof$14,000, |$15,000, |and$31,000, |respectively. |The |mode |of
|this |group's |distribution |of |annual |incomes |is
$10,000.
$15,000.
$16,000.
$31,000.
5. The|mean|of|a|distribution|of|scores|is|the
|most frequentlyoccurring score.
a a
|arithmetic average |of |all |the |scores.
a
least|frequentlyoccurring score.
a
score|exceeded by|50|percent |of|all |the|scores.
a
6. Which|measure|of|central|tendencyis|used to calculate|the|average|of|your|sc
a a
|hool|grades?
standard deviation
a
|median
mean
|mode
Page |1
