Stats 1770 Final Exam Questions With
Accurate Answers
In a study, the data you collect is weight in pounds.
This data is:
A) Quantitative-discrete.
B) Quantitative-continuous.
C) Qualitative (categorical). - ANSWER B) Quntitative-continuous.
Determine if the following is an example of descriptive or inferential statistics:
A survey was done asking 300 students how old they are. A histogram was produced to
display the results of the survey. - ANSWER Descriptive statistics.
A group of students are told to listen to music while taking a test and their results are
compared to a group not listening to music. Does this describe an observational study or
an experiment? - ANSWER An experiment.
Determine whether the following is an example of a sampling error or a non sampling
error:
A sociologist surveyed 300 people about their level of anxiety on a scale of 1 to 100.
Unfortunately, the person inputting the data into the computer accidentally transposed
six of the numbers causing the statistics to have errors. - ANSWER Non-sampling error.
, T/F:
If the sample size is much smaller than the population size, say 20 times smaller, then
random sampling with replacement and random sampling without replacement are
nearly equivalent. - ANSWER True.
The five number summary of a dataset was found to be: 47, 54, 65, 68, 70.
An observation would be considered an outlier if it was below ____ or above ____. -
ANSWER Below: 26.
Or
Above: 91.
On a recent quiz, the class mean was 72 with a standard deviation of 2.9.
Calculate the z-score (to at least 2 decimal places) for a person who received score of 68.
- ANSWER Z-score = -1.3793103448276.
On a nationwide math test, the mean was 72 and the standard deviation was 4. If
Roberto scored 85, what was his z-score? - ANSWER Z-score = 3.25.
The average height of American adult males is 177 cm, with a standard deviation of 7.4
cm. Meanwhile, the average height of Indian males is 165 cm, with a standard deviation
of 6.7 cm. Which is taller relative to his nationality, a 174-cm American man or a 162-cm
Indian man? - ANSWER The American man is taller relative to his nationality.
Can the value 3 be a probability? - ANSWER No because it is above 1.
Accurate Answers
In a study, the data you collect is weight in pounds.
This data is:
A) Quantitative-discrete.
B) Quantitative-continuous.
C) Qualitative (categorical). - ANSWER B) Quntitative-continuous.
Determine if the following is an example of descriptive or inferential statistics:
A survey was done asking 300 students how old they are. A histogram was produced to
display the results of the survey. - ANSWER Descriptive statistics.
A group of students are told to listen to music while taking a test and their results are
compared to a group not listening to music. Does this describe an observational study or
an experiment? - ANSWER An experiment.
Determine whether the following is an example of a sampling error or a non sampling
error:
A sociologist surveyed 300 people about their level of anxiety on a scale of 1 to 100.
Unfortunately, the person inputting the data into the computer accidentally transposed
six of the numbers causing the statistics to have errors. - ANSWER Non-sampling error.
, T/F:
If the sample size is much smaller than the population size, say 20 times smaller, then
random sampling with replacement and random sampling without replacement are
nearly equivalent. - ANSWER True.
The five number summary of a dataset was found to be: 47, 54, 65, 68, 70.
An observation would be considered an outlier if it was below ____ or above ____. -
ANSWER Below: 26.
Or
Above: 91.
On a recent quiz, the class mean was 72 with a standard deviation of 2.9.
Calculate the z-score (to at least 2 decimal places) for a person who received score of 68.
- ANSWER Z-score = -1.3793103448276.
On a nationwide math test, the mean was 72 and the standard deviation was 4. If
Roberto scored 85, what was his z-score? - ANSWER Z-score = 3.25.
The average height of American adult males is 177 cm, with a standard deviation of 7.4
cm. Meanwhile, the average height of Indian males is 165 cm, with a standard deviation
of 6.7 cm. Which is taller relative to his nationality, a 174-cm American man or a 162-cm
Indian man? - ANSWER The American man is taller relative to his nationality.
Can the value 3 be a probability? - ANSWER No because it is above 1.
