2
Straighterline Business Stats Final exam || || || || ||
with correct detailed answers || || ||
The main purpose of descriptive statistics is to - Correct answer ✔Summarize
|| || || || || || || || || || || ||
data in a useful and informative manner
|| || || || || ||
Which word is NOT part of the definition of descriptive statistics? - Correct
|| || || || || || || || || || || || ||
answer ✔Predicting ||
A marketing class of 50 students evaluated the instructor using the following
|| || || || || || || || || || || ||
scale: superior, good, average, poor, and inferior. The descriptive summary
|| || || || || || || || || ||
showed the following survey results: 2% superior, 8% good, 45% average, 45%
|| || || || || || || || || || || ||
poor, and 0% inferior. - Correct answer ✔c. Most students rated the instructor as
|| || || || || || || || || || || || ||
poor or average.
|| || ||
What type of variable is the number of robberies reported in your city? - Correct
|| || || || || || || || || || || || || || ||
answer ✔Quantitative ||
The Nielsen Ratings break down the number of people watching a particular
|| || || || || || || || || || || ||
television show by age. What level of measurement is age? - Correct answer
|| || || || || || || || || || || || ||
✔Ratio
What level of measurement is a person's "favorite sport"? - Correct answer
|| || || || || || || || || || || ||
✔Nominal
, 2
The final rankings of the top 20 NCAA college basketball teams are an example
|| || || || || || || || || || || || || ||
of which level of measurement? - Correct answer ✔Ordinal
|| || || || || || || ||
What level of measurement is the Centigrade temperature scale? - Correct
|| || || || || || || || || || ||
answer ✔Interval ||
A survey includes a question regarding marital status that has the following
|| || || || || || || || || || || ||
responses: single, married, divorced, separated, or widowed. What is the scale
|| || || || || || || || || || ||
of measurement for this question? - Correct answer ✔Nominal
|| || || || || || || ||
A group of women tried five brands of fingernail polish and ranked them
|| || || || || || || || || || || || ||
according to preference. What level of measurement is this? - Correct answer
|| || || || || || || || || || || ||
✔Ordinal
Shoe style is an example of what level of measurement? - Correct answer
|| || || || || || || || || || || || ||
✔Nominal
When TV advertisements report "2 out of 3 dentists surveyed indicated they
|| || || || || || || || || || || ||
would recommend Brand X toothpaste to their patients," an informed consumer
|| || || || || || || || || ||
may question the conclusion because the: - Correct answer ✔Advertisement
|| || || || || || || || || || ||
does not include the total number of dentists surveyed
|| || || || || || || ||
A sample of the paramedical fees charged by clinics revealed these amounts:
|| || || || || || || || || || || ||
$55, $49, $50, $45, $52, and $55. What is the median charge? - Correct answer
|| || || || || || || || || || || || || || ||
✔51.00
, 2
For a data set with an odd number of observations that have been sorted from
|| || || || || || || || || || || || || || ||
smallest to largest values, where is the median located? - Correct answer ✔(n +
|| || || || || || || || || || || || || ||
1)/2
Assume a student received the following grades for the semester: History, B;
|| || || || || || || || || || || ||
Statistics, A; Spanish, C; and English, C. History and English are 5 credit-hour
|| || || || || || || || || || || || ||
courses, Statistics a 4 credit-hour course, and Spanish a 3 credit-hour course. If
|| || || || || || || || || || || || ||
4 grade points are assigned for an A, 3 for a B, and 2 for a C, what is the
|| || || || || || || || || || || || || || || || || || || ||
weighted mean grade for the semester? - Correct answer ✔2.76 || || || || || || || || ||
A disadvantage of using an arithmetic mean to summarize a set of data is that
|| || || || || || || || || || || || || || ||
__________. - Correct answer ✔It can be biased by one or two extremely small || || || || || || || || || || || || || ||
or large values|| ||
A survey item asked students to indicate their class in college: freshman,
|| || || || || || || || || || || ||
sophomore, junior, or senior. Which measure(s) of central location would be || || || || || || || || || || ||
appropriate for the data generated by that questionnaire item? - Correct answer || || || || || || || || || || || ||
✔Mode and median || ||
The times (in minutes) that several underwriters took to review applications for
|| || || || || || || || || || ||
similar insurance coverage are 50, 230, 52, and 57. What is the median length of
|| || || || || || || || || || || || || || ||
time required to review an application? - Correct answer ✔54.5
|| || || || || || || || || ||
For the most recent seven years, the U.S. Department of Education reported the
|| || || || || || || || || || || || ||
following number of bachelor's degrees awarded in computer science: 4,033;
|| || || || || || || || || ||
5,652; 6,407; 7,201; 8,719; 11,154; 15,121. What is the annual arithmetic mean
|| || || || || || || || || || || ||
number of degrees awarded? - Correct answer ✔About 8,327
|| || || || || || || ||
, 2
Which of the following measures of dispersion are based on deviations from the
|| || || || || || || || || || || ||
mean? - Correct answer ✔All apply
|| || || || || ||
From the easiest to the hardest "ease of interpretation," rank the measures of
|| || || || || || || || || || || || ||
dispersion. - Correct answer ✔Range, mean deviation, variance || || || || || || ||
The weights of a sample of crates ready for shipment to Moscow, Russia are (in
|| || || || || || || || || || || || || || ||
kilograms): 103, 97, 101, 106, and 103. What is the mean deviation? - Correct|| || || || || || || || || || || || || ||
answer ✔2.4 kg || ||
A sample of assistant professors on the business faculty at state-supported
|| || || || || || || || || || ||
institutions in Ohio revealed the mean income to be $72,000 for nine months, || || || || || || || || || || || || ||
with a standard deviation of $3,000. Using Chebyshev's Theorem, what
|| || || || || || || || || ||
proportion of the faculty earns more than $66,000, but less than $78,000? -
|| || || || || || || || || || || || ||
Correct answer ✔At least 75% || || || ||
Based on the Empirical Rule, what percent of the observations will lie between
|| || || || || || || || || || || || ||
plus or minus two standard deviations from the mean? - Correct answer ✔95%
|| || || || || || || || || || || ||
What is the relationship between the variance and the standard deviation? -
|| || || || || || || || || || || ||
Correct answer ✔Variance is the square of the standard deviation.
|| || || || || || || || ||
What statistics are needed to draw a box plot? - Correct answer ✔The
|| || || || || || || || || || || || ||
minimum, maximum, median, first and third quartiles || || || || || ||
Straighterline Business Stats Final exam || || || || ||
with correct detailed answers || || ||
The main purpose of descriptive statistics is to - Correct answer ✔Summarize
|| || || || || || || || || || || ||
data in a useful and informative manner
|| || || || || ||
Which word is NOT part of the definition of descriptive statistics? - Correct
|| || || || || || || || || || || || ||
answer ✔Predicting ||
A marketing class of 50 students evaluated the instructor using the following
|| || || || || || || || || || || ||
scale: superior, good, average, poor, and inferior. The descriptive summary
|| || || || || || || || || ||
showed the following survey results: 2% superior, 8% good, 45% average, 45%
|| || || || || || || || || || || ||
poor, and 0% inferior. - Correct answer ✔c. Most students rated the instructor as
|| || || || || || || || || || || || ||
poor or average.
|| || ||
What type of variable is the number of robberies reported in your city? - Correct
|| || || || || || || || || || || || || || ||
answer ✔Quantitative ||
The Nielsen Ratings break down the number of people watching a particular
|| || || || || || || || || || || ||
television show by age. What level of measurement is age? - Correct answer
|| || || || || || || || || || || || ||
✔Ratio
What level of measurement is a person's "favorite sport"? - Correct answer
|| || || || || || || || || || || ||
✔Nominal
, 2
The final rankings of the top 20 NCAA college basketball teams are an example
|| || || || || || || || || || || || || ||
of which level of measurement? - Correct answer ✔Ordinal
|| || || || || || || ||
What level of measurement is the Centigrade temperature scale? - Correct
|| || || || || || || || || || ||
answer ✔Interval ||
A survey includes a question regarding marital status that has the following
|| || || || || || || || || || || ||
responses: single, married, divorced, separated, or widowed. What is the scale
|| || || || || || || || || || ||
of measurement for this question? - Correct answer ✔Nominal
|| || || || || || || ||
A group of women tried five brands of fingernail polish and ranked them
|| || || || || || || || || || || || ||
according to preference. What level of measurement is this? - Correct answer
|| || || || || || || || || || || ||
✔Ordinal
Shoe style is an example of what level of measurement? - Correct answer
|| || || || || || || || || || || || ||
✔Nominal
When TV advertisements report "2 out of 3 dentists surveyed indicated they
|| || || || || || || || || || || ||
would recommend Brand X toothpaste to their patients," an informed consumer
|| || || || || || || || || ||
may question the conclusion because the: - Correct answer ✔Advertisement
|| || || || || || || || || || ||
does not include the total number of dentists surveyed
|| || || || || || || ||
A sample of the paramedical fees charged by clinics revealed these amounts:
|| || || || || || || || || || || ||
$55, $49, $50, $45, $52, and $55. What is the median charge? - Correct answer
|| || || || || || || || || || || || || || ||
✔51.00
, 2
For a data set with an odd number of observations that have been sorted from
|| || || || || || || || || || || || || || ||
smallest to largest values, where is the median located? - Correct answer ✔(n +
|| || || || || || || || || || || || || ||
1)/2
Assume a student received the following grades for the semester: History, B;
|| || || || || || || || || || || ||
Statistics, A; Spanish, C; and English, C. History and English are 5 credit-hour
|| || || || || || || || || || || || ||
courses, Statistics a 4 credit-hour course, and Spanish a 3 credit-hour course. If
|| || || || || || || || || || || || ||
4 grade points are assigned for an A, 3 for a B, and 2 for a C, what is the
|| || || || || || || || || || || || || || || || || || || ||
weighted mean grade for the semester? - Correct answer ✔2.76 || || || || || || || || ||
A disadvantage of using an arithmetic mean to summarize a set of data is that
|| || || || || || || || || || || || || || ||
__________. - Correct answer ✔It can be biased by one or two extremely small || || || || || || || || || || || || || ||
or large values|| ||
A survey item asked students to indicate their class in college: freshman,
|| || || || || || || || || || || ||
sophomore, junior, or senior. Which measure(s) of central location would be || || || || || || || || || || ||
appropriate for the data generated by that questionnaire item? - Correct answer || || || || || || || || || || || ||
✔Mode and median || ||
The times (in minutes) that several underwriters took to review applications for
|| || || || || || || || || || ||
similar insurance coverage are 50, 230, 52, and 57. What is the median length of
|| || || || || || || || || || || || || || ||
time required to review an application? - Correct answer ✔54.5
|| || || || || || || || || ||
For the most recent seven years, the U.S. Department of Education reported the
|| || || || || || || || || || || || ||
following number of bachelor's degrees awarded in computer science: 4,033;
|| || || || || || || || || ||
5,652; 6,407; 7,201; 8,719; 11,154; 15,121. What is the annual arithmetic mean
|| || || || || || || || || || || ||
number of degrees awarded? - Correct answer ✔About 8,327
|| || || || || || || ||
, 2
Which of the following measures of dispersion are based on deviations from the
|| || || || || || || || || || || ||
mean? - Correct answer ✔All apply
|| || || || || ||
From the easiest to the hardest "ease of interpretation," rank the measures of
|| || || || || || || || || || || || ||
dispersion. - Correct answer ✔Range, mean deviation, variance || || || || || || ||
The weights of a sample of crates ready for shipment to Moscow, Russia are (in
|| || || || || || || || || || || || || || ||
kilograms): 103, 97, 101, 106, and 103. What is the mean deviation? - Correct|| || || || || || || || || || || || || ||
answer ✔2.4 kg || ||
A sample of assistant professors on the business faculty at state-supported
|| || || || || || || || || || ||
institutions in Ohio revealed the mean income to be $72,000 for nine months, || || || || || || || || || || || || ||
with a standard deviation of $3,000. Using Chebyshev's Theorem, what
|| || || || || || || || || ||
proportion of the faculty earns more than $66,000, but less than $78,000? -
|| || || || || || || || || || || || ||
Correct answer ✔At least 75% || || || ||
Based on the Empirical Rule, what percent of the observations will lie between
|| || || || || || || || || || || || ||
plus or minus two standard deviations from the mean? - Correct answer ✔95%
|| || || || || || || || || || || ||
What is the relationship between the variance and the standard deviation? -
|| || || || || || || || || || || ||
Correct answer ✔Variance is the square of the standard deviation.
|| || || || || || || || ||
What statistics are needed to draw a box plot? - Correct answer ✔The
|| || || || || || || || || || || || ||
minimum, maximum, median, first and third quartiles || || || || || ||
