MATH 225N Statistics Final EXAM – Chamberlain College of Nursing
MATH 225N Statistics Final EXAM 2026 Update!!
the number of goals scored in a hockey game - (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. - (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? - (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? - (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. - (ANSWER)cross-sectional;
Information is collected at a specific point in time.
Identify the type of sampling used.
,MATH 225N Statistics Final EXAM – Chamberlain College of Nursing
MATH 225N Statistics Final EXAM 2026 Update!!
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? - (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. - (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? - (ANSWER)closed question
Classify the variable as qualitative or quantitative.
the number of calls received at a company's help desk - (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.
, MATH 225N Statistics Final EXAM – Chamberlain College of Nursing
MATH 225N Statistics Final EXAM 2026 Update!!
Find the IQR. - (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 mutual fund investment is the most consistent in rate of return? -
(ANSWER)Together Fund
Provide an appropriate response.
Last year batting averages in professional baseball averaged 0.256 with a high of and a low of (minimum
250 at-bats). Based on this information, which measure of variation could be calculated? -
(ANSWER)range
Provide an appropriate response.
Given the following five-number summary, find the IQR.
2.9, 5.7, 10.0, 13.2, 21.1. - (ANSWER)7.5
Which measure of central tendency may not exist for all numeric data sets? - (ANSWER)mode
Provide an appropriate response.
Civil engineers often use the straight-line equation, E(y) = β0 + β1x, to model the relationship between
the mean shear strength E(y) of masonry joints and precompression stress, x. To test this theory, a series
of stress tests were performed on solid bricks arranged in triplets and joined with mortar. The
precompression stress was varied for each triplet and the ultimate shear load just before failure (called
MATH 225N Statistics Final EXAM 2026 Update!!
the number of goals scored in a hockey game - (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. - (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? - (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? - (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. - (ANSWER)cross-sectional;
Information is collected at a specific point in time.
Identify the type of sampling used.
,MATH 225N Statistics Final EXAM – Chamberlain College of Nursing
MATH 225N Statistics Final EXAM 2026 Update!!
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? - (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. - (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? - (ANSWER)closed question
Classify the variable as qualitative or quantitative.
the number of calls received at a company's help desk - (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.
, MATH 225N Statistics Final EXAM – Chamberlain College of Nursing
MATH 225N Statistics Final EXAM 2026 Update!!
Find the IQR. - (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 mutual fund investment is the most consistent in rate of return? -
(ANSWER)Together Fund
Provide an appropriate response.
Last year batting averages in professional baseball averaged 0.256 with a high of and a low of (minimum
250 at-bats). Based on this information, which measure of variation could be calculated? -
(ANSWER)range
Provide an appropriate response.
Given the following five-number summary, find the IQR.
2.9, 5.7, 10.0, 13.2, 21.1. - (ANSWER)7.5
Which measure of central tendency may not exist for all numeric data sets? - (ANSWER)mode
Provide an appropriate response.
Civil engineers often use the straight-line equation, E(y) = β0 + β1x, to model the relationship between
the mean shear strength E(y) of masonry joints and precompression stress, x. To test this theory, a series
of stress tests were performed on solid bricks arranged in triplets and joined with mortar. The
precompression stress was varied for each triplet and the ultimate shear load just before failure (called
