MATH 225N Statistics Final EXAM –
Chamberlain College of Nursing MATH
225N Exam 2026 Questions and Answers
Graded A+
the number of goals scored in a hockey game - Correct answer-discrete
A scientist was studying the effects of a new fertilizer on crop yield. She randomly
assigned half of the plots on a farm to group one and the remaining plots to group
two. On the plots in group one, the new fertilizer was used for a year. On the plots
in group two, the old fertilizer was used. At the end of the year the average crop
yield for the plots in group one was compared with the average crop yield for the
plots in group two. - Correct answer-experiment
Identify the type of sampling used.
A travel industry researcher interviews all of the passengers on five randomly
selected cruises. What sampling technique is used? - Correct answer-cluster
,Identify the type of sampling used.
A lobbyist for the oil industry assigns a number to each senator and then uses a
computer to randomly generate ten numbers. The lobbyist contacts the senators
corresponding to these numbers. What sampling technique was used? - Correct
answer-simple random
Determine what type of observational study is described. Explain.
Researchers wanted to determine whether there was an association between high
blood pressure and the suppression of emotions. The researchers looked at 1800
adults enrolled in a Health Initiative Observational Study. Each person was
interviewed and asked about their response to emotions. In particular they were
asked whether their tendency was to express or to hold in anger and other
emotions. The degree of suppression of emotions was rated on a scale of 1 to 10.
Each person's blood pressure was also measured. The researchers analyzed the
results to determine whether there was an association between high blood pressure
and the suppression of emotions. - Correct answer-cross-sectional; Information is
collected at a specific point in time.
Identify the type of sampling used.
,Thirty-five math majors, 47 music majors and 51 history majors are randomly
selected from 376 math majors, 591 music majors and 267 history majors at the
state university. What sampling technique is used? - Correct answer-stratified
Determine what type of observational study is described. Explain.
Researchers wanted to determine whether there was an association between high
blood pressure and the suppression of emotions. The researchers looked at 1800
adults enrolled in a Health Initiative Observational Study. Each person was
interviewed and asked about their response to emotions. In particular they were
asked whether their tendency was to express or to hold in anger and other
emotions. The degree of suppression of emotions was rated on a scale of 1 to 10.
Each person's blood pressure was also measured. The researchers analyzed the
results to determine whether there was an association between high blood pressure
and the suppression of emotions. - Correct answer-cross-sectional; Information is
collected at a specific point in time.
Provide an appropriate response.
, Multiple choice questions on a test that include as one of the choices "none of the
above" are an example of what type of question? - Correct answer-closed question
Classify the variable as qualitative or quantitative.
the number of calls received at a company's help desk - Correct answer-
quantitative
Provide an appropriate response.
The following data are the yields, in bushels, of hay from a farmer's last 10 years:
375, 210, 150, 147, 429, 189, 320, 580, 407, 180.
Find the IQR. - Correct answer-227
Provide an appropriate response.
Over the last 10 years four mutual funds all had the same mean rate of return, 12%.
These mutual funds had different standard deviations as follows: Mutual Money
8%, Co-joined Investments 6%, Together Fund 4%, All for One Fund 9%. Which
Chamberlain College of Nursing MATH
225N Exam 2026 Questions and Answers
Graded A+
the number of goals scored in a hockey game - Correct answer-discrete
A scientist was studying the effects of a new fertilizer on crop yield. She randomly
assigned half of the plots on a farm to group one and the remaining plots to group
two. On the plots in group one, the new fertilizer was used for a year. On the plots
in group two, the old fertilizer was used. At the end of the year the average crop
yield for the plots in group one was compared with the average crop yield for the
plots in group two. - Correct answer-experiment
Identify the type of sampling used.
A travel industry researcher interviews all of the passengers on five randomly
selected cruises. What sampling technique is used? - Correct answer-cluster
,Identify the type of sampling used.
A lobbyist for the oil industry assigns a number to each senator and then uses a
computer to randomly generate ten numbers. The lobbyist contacts the senators
corresponding to these numbers. What sampling technique was used? - Correct
answer-simple random
Determine what type of observational study is described. Explain.
Researchers wanted to determine whether there was an association between high
blood pressure and the suppression of emotions. The researchers looked at 1800
adults enrolled in a Health Initiative Observational Study. Each person was
interviewed and asked about their response to emotions. In particular they were
asked whether their tendency was to express or to hold in anger and other
emotions. The degree of suppression of emotions was rated on a scale of 1 to 10.
Each person's blood pressure was also measured. The researchers analyzed the
results to determine whether there was an association between high blood pressure
and the suppression of emotions. - Correct answer-cross-sectional; Information is
collected at a specific point in time.
Identify the type of sampling used.
,Thirty-five math majors, 47 music majors and 51 history majors are randomly
selected from 376 math majors, 591 music majors and 267 history majors at the
state university. What sampling technique is used? - Correct answer-stratified
Determine what type of observational study is described. Explain.
Researchers wanted to determine whether there was an association between high
blood pressure and the suppression of emotions. The researchers looked at 1800
adults enrolled in a Health Initiative Observational Study. Each person was
interviewed and asked about their response to emotions. In particular they were
asked whether their tendency was to express or to hold in anger and other
emotions. The degree of suppression of emotions was rated on a scale of 1 to 10.
Each person's blood pressure was also measured. The researchers analyzed the
results to determine whether there was an association between high blood pressure
and the suppression of emotions. - Correct answer-cross-sectional; Information is
collected at a specific point in time.
Provide an appropriate response.
, Multiple choice questions on a test that include as one of the choices "none of the
above" are an example of what type of question? - Correct answer-closed question
Classify the variable as qualitative or quantitative.
the number of calls received at a company's help desk - Correct answer-
quantitative
Provide an appropriate response.
The following data are the yields, in bushels, of hay from a farmer's last 10 years:
375, 210, 150, 147, 429, 189, 320, 580, 407, 180.
Find the IQR. - Correct answer-227
Provide an appropriate response.
Over the last 10 years four mutual funds all had the same mean rate of return, 12%.
These mutual funds had different standard deviations as follows: Mutual Money
8%, Co-joined Investments 6%, Together Fund 4%, All for One Fund 9%. Which
