SNHU-Sophia - Foundations of
Statistics Challenges
A veterinarian has five feline patients that need to lose weight. She gives the cats five
different brands of food in the same amount and weighs them every week for two
months to see if any of the brands are more effective for losing weight.
Given this situation, which statement is true? - answerThe brand of cat food is an
explanatory variable, while the change in cat weight is a response variable.
Mark's parents want him to ride on a fire truck with other kids in the upcoming
Independence Day Parade. But Mark just got his driver's license, and he wants to drive
his father's Camaro in the parade to impress a girl named Katelyn.
Given this situation, which statement is true? - answerHow Mark participates in the
parade is an explanatory variable. Whether or not Katelyn is impressed is a response
variable.
For the first time ever, Robert brought home a report card with straight-As. His parents
wonder how he improved his grades from previous semesters. Robert says that he has
dedicated more time every night to studying than he had previously.
Given this situation, which statement is true? - answerThe amount of time Robert spent
studying is the explanatory variable, while his grades are the response variable.
Kayla has been hired to study the effects of a new arthritis medication that's soon to be
released. She sets up an experiment and divides participants into two groups. Group A
gets the drug; Group B gets a placebo.
Which of the following is a correct pairing of possible null and alternative hypotheses for
this experiment? - answerThe null hypothesis is that Groups A and B report no
difference in arthritis issues.The alternative hypothesis is that Group A reports fewer
arthritis issues than Group B.
A study seeks to find a possible cause and effect relationship between the amount of
snowfall and the number of school closures in a certain county.
Which of the following is a correct pairing of possible null and alternative hypotheses for
this experiment? - answerThe null hypothesis is that the amount of snowfall has no
impact on the number of school closures.
The alternative hypothesis is that as the amount of snowfall increases, the number of
school closures also increases.
, A researcher is testing the effectiveness of a new weight loss pill on groups of patients
to see whether or not it actually works. Group A takes the pill while group B does not.
Which of the following is a correct pairing of possible null and alternative hypotheses for
this experiment? - answerThe null hypothesis is that groups A and B show no difference
in weight loss.The alternative hypothesis is that group A loses more weight than group
B.
A new shop owner has a store 0.5 miles from where it is advertised. She read that it
takes the average adult 8 minutes to walk a half mile. She decides to test this and wants
to obtain a random sample of 200 adults.
Which of the following would NOT be a proper method of selecting a random sample of
adults? - answerPutting an ad in the paper and having interested people contact her.
You heard that talking to your plants might help them to grow faster. To test this you put
5 plants in one room and talk to them every day. You put 5 more in another room and
do not talk to them.
Which of the following would be an example of a control variable you might use in this
experiment? - answerMaking sure the plants in both rooms get the same amount of
water.
Lisa puts up a sign for her business one-half mile from the main entrance. She read that
it takes the average adult 8 minutes to walk a half mile. She decides to test this by
having 200 adults walk the half-mile from her sign to her store.
Which of the following is an example of using a control variable in this experiment? -
answerAsking all the people to walk to the store in the same temperature conditions.
Which of the following shows selection bias? - answerA dog store owner wants to know
how much dog food to stock by interviewing only people who enter with their dog.
All of the following show participation bias EXCEPT: - answerConducting a survey
about drinking habits anonymously.
All of the following statements show selection bias EXCEPT: - answerA study's
conclusion was based on data submitted voluntarily.
When determining what information a graph conveys, it is important to first determine
what type of data the x-axis represents.
Which data scale is represented in this graph?
(Common mechanical issues with 1969 Camaro) - answerNominal
Statistics Challenges
A veterinarian has five feline patients that need to lose weight. She gives the cats five
different brands of food in the same amount and weighs them every week for two
months to see if any of the brands are more effective for losing weight.
Given this situation, which statement is true? - answerThe brand of cat food is an
explanatory variable, while the change in cat weight is a response variable.
Mark's parents want him to ride on a fire truck with other kids in the upcoming
Independence Day Parade. But Mark just got his driver's license, and he wants to drive
his father's Camaro in the parade to impress a girl named Katelyn.
Given this situation, which statement is true? - answerHow Mark participates in the
parade is an explanatory variable. Whether or not Katelyn is impressed is a response
variable.
For the first time ever, Robert brought home a report card with straight-As. His parents
wonder how he improved his grades from previous semesters. Robert says that he has
dedicated more time every night to studying than he had previously.
Given this situation, which statement is true? - answerThe amount of time Robert spent
studying is the explanatory variable, while his grades are the response variable.
Kayla has been hired to study the effects of a new arthritis medication that's soon to be
released. She sets up an experiment and divides participants into two groups. Group A
gets the drug; Group B gets a placebo.
Which of the following is a correct pairing of possible null and alternative hypotheses for
this experiment? - answerThe null hypothesis is that Groups A and B report no
difference in arthritis issues.The alternative hypothesis is that Group A reports fewer
arthritis issues than Group B.
A study seeks to find a possible cause and effect relationship between the amount of
snowfall and the number of school closures in a certain county.
Which of the following is a correct pairing of possible null and alternative hypotheses for
this experiment? - answerThe null hypothesis is that the amount of snowfall has no
impact on the number of school closures.
The alternative hypothesis is that as the amount of snowfall increases, the number of
school closures also increases.
, A researcher is testing the effectiveness of a new weight loss pill on groups of patients
to see whether or not it actually works. Group A takes the pill while group B does not.
Which of the following is a correct pairing of possible null and alternative hypotheses for
this experiment? - answerThe null hypothesis is that groups A and B show no difference
in weight loss.The alternative hypothesis is that group A loses more weight than group
B.
A new shop owner has a store 0.5 miles from where it is advertised. She read that it
takes the average adult 8 minutes to walk a half mile. She decides to test this and wants
to obtain a random sample of 200 adults.
Which of the following would NOT be a proper method of selecting a random sample of
adults? - answerPutting an ad in the paper and having interested people contact her.
You heard that talking to your plants might help them to grow faster. To test this you put
5 plants in one room and talk to them every day. You put 5 more in another room and
do not talk to them.
Which of the following would be an example of a control variable you might use in this
experiment? - answerMaking sure the plants in both rooms get the same amount of
water.
Lisa puts up a sign for her business one-half mile from the main entrance. She read that
it takes the average adult 8 minutes to walk a half mile. She decides to test this by
having 200 adults walk the half-mile from her sign to her store.
Which of the following is an example of using a control variable in this experiment? -
answerAsking all the people to walk to the store in the same temperature conditions.
Which of the following shows selection bias? - answerA dog store owner wants to know
how much dog food to stock by interviewing only people who enter with their dog.
All of the following show participation bias EXCEPT: - answerConducting a survey
about drinking habits anonymously.
All of the following statements show selection bias EXCEPT: - answerA study's
conclusion was based on data submitted voluntarily.
When determining what information a graph conveys, it is important to first determine
what type of data the x-axis represents.
Which data scale is represented in this graph?
(Common mechanical issues with 1969 Camaro) - answerNominal
