Straighterline Statistics Final Exam
Questions with complete solutions
anais |is |organizing |her |rock |collection |and |places |each |rock |in |one |of |three |categories: |small, |
medium, |or |large. |this |illustrates |what |level |of |measurement? |- |VERIFIED |ANSWER✔✔-ordinal
which |of |the |following |is |an |example |of |a |nominal |variable? |- |VERIFIED |ANSWER✔✔-gender
what |sort |of |data |are |temperature |measurements? |- |VERIFIED |ANSWER✔✔-ratio
based |on |the |graph, |which |statement |best |describes |the |relationship |between |daily |high |
temperatures |and |the |number |of |people |going |to |the |beach? |- |VERIFIED |ANSWER✔✔-it |is |negative |
linear |relationship
the |table |shows |the |number |of |train |tickets |carl |purchased |to |each |station |over |the |last |month |and |
the |fare |to |each |station. |what |was |the |average |cost |per |ride? |- |VERIFIED |ANSWER✔✔-$5.45
the |outcomes |observes |in |an |experiment |are: |2, |8, |3, |10, |4, |and |9. |what |is |the |sample |variance? |- |
VERIFIED |ANSWER✔✔-11.6
jason |collects |information |about |annual |family |income |from |each |student |at |his |college. |he |computes
|both |the |mean |and |median |family |income |across |all |students |and |is |surprised |to |find |that |the |mean |
income |is |higher |than |the |median |income. |what |is |the |most |likely |reason |for |the |difference |in |the |
mean |and |the |median? |- |VERIFIED |ANSWER✔✔-the |mean |is |more |affected |by |a |small |number |of |
extreme |values
an |instructor |administers |a |test |to |a |class |of |30 |students |and |observes |that |the |scores |are |close |to |
normally |distributed |with |a |mean |score |of |40 |and |a |standard |deviation |of |10. |what |can |you |conclude |
from |these |results? |- |VERIFIED |ANSWER✔✔-the |average |student |scored |at |the |40th |percentile
laura's |quiz |scores |during |the |semester |were |87, |82, |90, |92, |and |84. |what |was |her |mean |score |- |
VERIFIED |ANSWER✔✔-87
, the |table |lists |the |populations |and |relative |frequencies |of |car |ownership |in |4 |neighboring |cities. |which
|city |has |the |most |cars? |- |VERIFIED |ANSWER✔✔-westville
in |the |figure |shown, |sample |a |and |sample |b |have |the |same |- |VERIFIED |ANSWER✔✔-median
the |contingency |table |describes |the |living |arrangements |of |students |at |a |small |college. |what |
percentage |of |the |students |are |women |who |live |in |off-campus |housing? |- |VERIFIED |ANSWER✔✔-54
which |of |these |correlation |coefficients |shows |the |strongest |linear |relationship |between |2 |variables |- |
VERIFIED |ANSWER✔✔--0.31
what |conclusion |can |be |drawn |from |the |graph |of |average |daily |temperature |and |hot |beverage |sales |-
|VERIFIED |ANSWER✔✔-there |is |a |negative |correlation |between |average |daily |temperature |and |hot |
beverage |sales
the |coefficient |of |correlation |r |is |a |measurement |of |statistical |relationships |that |are |- |VERIFIED |
ANSWER✔✔-linear
a |bag |contains |marbles |of |different |colors |(red, |yellow, |and |blue) |and |different |sizes |(small |and |large).
|the |probability |of |picking |a |blue |marble |out |of |the |bag |is |0.10 |and |the |probability |of |picking |a |large |
marble |is |0.50. |what |is |the |probability |of |picking |a |large |blue |marble |- |VERIFIED |ANSWER✔✔-0.05
a |swimmer, |sarah, |hopes |to |compete |in |an |upcoming |meet. |there |are |8 |team |members |eligible |for |
the |breaststroke |event |at |the |meet, |but |only |1 |team |member |will |be |randomly |selected |to |compete |
in |that |event. |there |are |4 |team |members |eligible |for |the |butterfly |event |at |the |meet, |but |only |1 |team
|member |will |be |randomly |selected |to |compete |in |that |event. |sarah |is |eligible |to |compete |in |both |
events. |what |is |her |chance |of |being |selected |for |at |least |one |of |the |two |events |- |VERIFIED |
ANSWER✔✔-3 |in |8
The |graduating |class |of |a |small |college |has |170 |men |and |195 |women. |If |grades |and |gender |are |
independent, |what |is |the |probability |that |students |with |the |two |highest |grade |averages |will |be |both |
women? |- |VERIFIED |ANSWER✔✔-0.28
Questions with complete solutions
anais |is |organizing |her |rock |collection |and |places |each |rock |in |one |of |three |categories: |small, |
medium, |or |large. |this |illustrates |what |level |of |measurement? |- |VERIFIED |ANSWER✔✔-ordinal
which |of |the |following |is |an |example |of |a |nominal |variable? |- |VERIFIED |ANSWER✔✔-gender
what |sort |of |data |are |temperature |measurements? |- |VERIFIED |ANSWER✔✔-ratio
based |on |the |graph, |which |statement |best |describes |the |relationship |between |daily |high |
temperatures |and |the |number |of |people |going |to |the |beach? |- |VERIFIED |ANSWER✔✔-it |is |negative |
linear |relationship
the |table |shows |the |number |of |train |tickets |carl |purchased |to |each |station |over |the |last |month |and |
the |fare |to |each |station. |what |was |the |average |cost |per |ride? |- |VERIFIED |ANSWER✔✔-$5.45
the |outcomes |observes |in |an |experiment |are: |2, |8, |3, |10, |4, |and |9. |what |is |the |sample |variance? |- |
VERIFIED |ANSWER✔✔-11.6
jason |collects |information |about |annual |family |income |from |each |student |at |his |college. |he |computes
|both |the |mean |and |median |family |income |across |all |students |and |is |surprised |to |find |that |the |mean |
income |is |higher |than |the |median |income. |what |is |the |most |likely |reason |for |the |difference |in |the |
mean |and |the |median? |- |VERIFIED |ANSWER✔✔-the |mean |is |more |affected |by |a |small |number |of |
extreme |values
an |instructor |administers |a |test |to |a |class |of |30 |students |and |observes |that |the |scores |are |close |to |
normally |distributed |with |a |mean |score |of |40 |and |a |standard |deviation |of |10. |what |can |you |conclude |
from |these |results? |- |VERIFIED |ANSWER✔✔-the |average |student |scored |at |the |40th |percentile
laura's |quiz |scores |during |the |semester |were |87, |82, |90, |92, |and |84. |what |was |her |mean |score |- |
VERIFIED |ANSWER✔✔-87
, the |table |lists |the |populations |and |relative |frequencies |of |car |ownership |in |4 |neighboring |cities. |which
|city |has |the |most |cars? |- |VERIFIED |ANSWER✔✔-westville
in |the |figure |shown, |sample |a |and |sample |b |have |the |same |- |VERIFIED |ANSWER✔✔-median
the |contingency |table |describes |the |living |arrangements |of |students |at |a |small |college. |what |
percentage |of |the |students |are |women |who |live |in |off-campus |housing? |- |VERIFIED |ANSWER✔✔-54
which |of |these |correlation |coefficients |shows |the |strongest |linear |relationship |between |2 |variables |- |
VERIFIED |ANSWER✔✔--0.31
what |conclusion |can |be |drawn |from |the |graph |of |average |daily |temperature |and |hot |beverage |sales |-
|VERIFIED |ANSWER✔✔-there |is |a |negative |correlation |between |average |daily |temperature |and |hot |
beverage |sales
the |coefficient |of |correlation |r |is |a |measurement |of |statistical |relationships |that |are |- |VERIFIED |
ANSWER✔✔-linear
a |bag |contains |marbles |of |different |colors |(red, |yellow, |and |blue) |and |different |sizes |(small |and |large).
|the |probability |of |picking |a |blue |marble |out |of |the |bag |is |0.10 |and |the |probability |of |picking |a |large |
marble |is |0.50. |what |is |the |probability |of |picking |a |large |blue |marble |- |VERIFIED |ANSWER✔✔-0.05
a |swimmer, |sarah, |hopes |to |compete |in |an |upcoming |meet. |there |are |8 |team |members |eligible |for |
the |breaststroke |event |at |the |meet, |but |only |1 |team |member |will |be |randomly |selected |to |compete |
in |that |event. |there |are |4 |team |members |eligible |for |the |butterfly |event |at |the |meet, |but |only |1 |team
|member |will |be |randomly |selected |to |compete |in |that |event. |sarah |is |eligible |to |compete |in |both |
events. |what |is |her |chance |of |being |selected |for |at |least |one |of |the |two |events |- |VERIFIED |
ANSWER✔✔-3 |in |8
The |graduating |class |of |a |small |college |has |170 |men |and |195 |women. |If |grades |and |gender |are |
independent, |what |is |the |probability |that |students |with |the |two |highest |grade |averages |will |be |both |
women? |- |VERIFIED |ANSWER✔✔-0.28
