AP STATS TESTS SOLVED GRADING TO A+
Which of the following can be used to show a cause-and-effect relationship between two
variables? - answers✔✔A controlled experiment.
To check the effect of cold temperature on the elasticity of two brands of rubber bands, one box
of Brand A and one box of Brand B rubber bands are tested. Ten bands from the Brand A box are
placed in a freezer for two hours and ten bands from the Brand B box are kept at room
temperture. The amount of stretch before breakage is measured on each rubber band, and the
mean for the cold bands is compared to the mean for the others. Is this a good experimental
design? - answers✔✔No, because temperature is confounded with brand.
The boxplots above (picture not included but Set A is a little larger going from about 21-39 and
a line in the middle at 30....and Set B goes from about 22-38 and a line a little left of middle at
29) summarize two data sets, A and B. Which of the following must be true? - answers✔✔III
only-- which is "The data in Set A have a larger range that the data in Set B"
The heights of adult women are approximately normally distributed about a mean of 65 inches
with a standard deviation of 2 inches. If Rachael is at the 99th percentile in height for adult
women, then her height, in inches, is closest to - answers✔✔70
Chart:
Juniors / Job 13/ No Job 5/ Total 18......
Seniors/ Job 13/ No Job 26/ Total 39.....
Total/ Job 26/ No Job 31/ Total 57
Which of the following can be used to show a cause-and-effect relationship between two
variables? - answers✔✔A controlled experiment.
To check the effect of cold temperature on the elasticity of two brands of rubber bands, one box
of Brand A and one box of Brand B rubber bands are tested. Ten bands from the Brand A box are
placed in a freezer for two hours and ten bands from the Brand B box are kept at room
temperture. The amount of stretch before breakage is measured on each rubber band, and the
mean for the cold bands is compared to the mean for the others. Is this a good experimental
design? - answers✔✔No, because temperature is confounded with brand.
The boxplots above (picture not included but Set A is a little larger going from about 21-39 and
a line in the middle at 30....and Set B goes from about 22-38 and a line a little left of middle at
29) summarize two data sets, A and B. Which of the following must be true? - answers✔✔III
only-- which is "The data in Set A have a larger range that the data in Set B"
The heights of adult women are approximately normally distributed about a mean of 65 inches
with a standard deviation of 2 inches. If Rachael is at the 99th percentile in height for adult
women, then her height, in inches, is closest to - answers✔✔70
Chart:
Juniors / Job 13/ No Job 5/ Total 18......
Seniors/ Job 13/ No Job 26/ Total 39.....
Total/ Job 26/ No Job 31/ Total 57
