MATH 225N STATISTICS FINAL EXAM –
CHAMBERLAIN COLLEGE OF NURSING
MATH 225N STATISTICS FINAL EXAM| 135
COMPLETE QUESTIONS WITH 100% RATED
CORRECT ANSWERS (DETAILED ANSWERS
AND VERIFIED ANSWERS) | 2025 LATEST
UPDATED | GET A+
The owner of Torpid Oaks B&B wanted to know the average distance its guests had
traveled. A random sample of 16 guests showed a mean distance of 85 miles with a
standard deviation of 32 miles. The 90 percent confidence interval (in miles) for the
mean is approximately: -: ANSWER:(71.0, 99.0)
The margin of error of a confidence interval for μ is not affected by: -: ANSWER:
the sample mean
To estimate the average annual expenses of students on books and class materials a
sample of size 36 is taken. The sample mean is $850 and the sample standard
deviation is $54. A 99 percent confidence interval for the population mean is: -:
ANSWER: $825.48 to $874.52
,In a sample of 50 new Web sites registered on the Internet, 20 were anonymous (i.e.,
they shielded their name and contact information). Construct a 95 percent confidence
interval for the proportion of all new Web sites that were anonymous. -: ANSWER:
[0.264, 0.534]
Of 56 bank customers depositing a check, 15 received some cash back. Construct a
90 percent confidence interval for the proportion of all depositors who ask for cash
back. -: ANSWER: [0.171, 0.365]
A marketing firm is asked to estimate the percent of existing customers who would
purchase a "digital upgrade" to their basic cable TV service. The firm wants 85
percent confidence and an error of ± 5 percent (i.e. 0.05). What is the required sample
size (to the next higher integer)? -: ANSWER:208
A numerical characteristic of a population, as distinct from a statistic of a sample is
an example of a what? -: ANSWER: A Parameter
Statistics -: ANSWER: is the science of collecting, organizing, analyzing,
interpreting, and presenting data
refers to generalizing from a sample to a population, drawing conclusions, and
making decisions refers to -: ANSWER: Inferential Statistics
, refers to summarizing data rather than generalizing about the population is -:
ANSWER: Descriptive Statistics
True or False: A strong correlation between A and B would imply that B is caused
by A -: ANSWER: False
True or False: The number of checks processed at a bank in a day is an example of
categorical data -: ANSWER: False
True or False: The number of planes that land daily at an airport is an example of
discrete data -: ANSWER: True
True or False: The weight of a bag of dog food is an example of discrete data -:
ANSWER: False
True or False: It is easier to attempt a census of a large population instead of relying
on a sample -: ANSWER: False
True or False: Sampling error is completely avoidable by choosing the sample
scientifically -: ANSWER: False
CHAMBERLAIN COLLEGE OF NURSING
MATH 225N STATISTICS FINAL EXAM| 135
COMPLETE QUESTIONS WITH 100% RATED
CORRECT ANSWERS (DETAILED ANSWERS
AND VERIFIED ANSWERS) | 2025 LATEST
UPDATED | GET A+
The owner of Torpid Oaks B&B wanted to know the average distance its guests had
traveled. A random sample of 16 guests showed a mean distance of 85 miles with a
standard deviation of 32 miles. The 90 percent confidence interval (in miles) for the
mean is approximately: -: ANSWER:(71.0, 99.0)
The margin of error of a confidence interval for μ is not affected by: -: ANSWER:
the sample mean
To estimate the average annual expenses of students on books and class materials a
sample of size 36 is taken. The sample mean is $850 and the sample standard
deviation is $54. A 99 percent confidence interval for the population mean is: -:
ANSWER: $825.48 to $874.52
,In a sample of 50 new Web sites registered on the Internet, 20 were anonymous (i.e.,
they shielded their name and contact information). Construct a 95 percent confidence
interval for the proportion of all new Web sites that were anonymous. -: ANSWER:
[0.264, 0.534]
Of 56 bank customers depositing a check, 15 received some cash back. Construct a
90 percent confidence interval for the proportion of all depositors who ask for cash
back. -: ANSWER: [0.171, 0.365]
A marketing firm is asked to estimate the percent of existing customers who would
purchase a "digital upgrade" to their basic cable TV service. The firm wants 85
percent confidence and an error of ± 5 percent (i.e. 0.05). What is the required sample
size (to the next higher integer)? -: ANSWER:208
A numerical characteristic of a population, as distinct from a statistic of a sample is
an example of a what? -: ANSWER: A Parameter
Statistics -: ANSWER: is the science of collecting, organizing, analyzing,
interpreting, and presenting data
refers to generalizing from a sample to a population, drawing conclusions, and
making decisions refers to -: ANSWER: Inferential Statistics
, refers to summarizing data rather than generalizing about the population is -:
ANSWER: Descriptive Statistics
True or False: A strong correlation between A and B would imply that B is caused
by A -: ANSWER: False
True or False: The number of checks processed at a bank in a day is an example of
categorical data -: ANSWER: False
True or False: The number of planes that land daily at an airport is an example of
discrete data -: ANSWER: True
True or False: The weight of a bag of dog food is an example of discrete data -:
ANSWER: False
True or False: It is easier to attempt a census of a large population instead of relying
on a sample -: ANSWER: False
True or False: Sampling error is completely avoidable by choosing the sample
scientifically -: ANSWER: False
