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Businesses in a country are listed by size: small, medium, and large.
Explain why business size is an example of an ordinal-scaled
variable. [ Ans: ] The size of a business is ordinal-scaled because
it has values that can be used as an order or rank of a categorical
variable.
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Suppose that you measure the time it takes to download a video
from the internet.
a. Explain why the download time is a continuous numerical
variable.
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b. Explain why the download time is a ratio scaled variable. [
Ans: ] a) Download time is a continuous numerical variable
because it has numerical values that arise from a measuring
process.
b) Download times are numerical values that imply order and also
have a true zero point.
You want to select a random sample of
n=1 from a population of three items (which are called A, B, and
C). The rule for selecting the sample is as follows: Flip a coin; if it is
heads, pick item A; if it is tails, flip the coin again; this time, if it is
heads, choose B; if it is tails, choose C. Explain why this is a
probability sample but not a simple random sample. [ Ans: ] This
is a probability sample because the probability of each outcome
is known, but it is not a simple random sample because there is a
higher probability of picking item A than there is of picking item B
or of picking item C.
A hotel management company runs 10 hotels in a resort area. The
hotels have a mix of pricing—some hotels have budget-priced
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rooms, some have moderate-priced rooms, and some have
deluxe-priced rooms. Data are collected that indicate the
number of rooms that are occupied at each hotel on each day of
a month. Explain how the 10 hotels can be recoded into these
three price categories. [ Ans: ] Create three new categorical
variables, one for each type of priced room. Determine which
hotels include budget-priced rooms and reassign all data for
those hotels to a new categorical variable, budget-priced hotels.
Determine which hotels include moderate-priced rooms and
reassign all data for those hotels to a new categorical variable,
moderate-priced hotels. Determine which hotels include deluxe-
priced rooms and reassign all data for those hotels to a new
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categorical variable, deluxe-priced hotels.
A recent corporate survey indicated that companies that
acknowledge the supply chain as a strategic asset achieve 70%
higher performance. The "Leaders" in the survey point to next-
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generation supply chains, which are fast, flexible, and responsive.
They are more concerned with skills that separate a company
from the crowd: 51% say differentiating capabilities is the real key
to success. What additional information would you want to know
about the survey before you accepted the results of the study? [
Ans: ] A. What was the margin of error and sample size?
B. Who funded the study?
C. What sampling design was used?
D. (NOT D)
E. What was the population from which the sample was selected?
F. What was the response rate?
How do the average credit scores of people living in different
cities differ? The data in the accompanying table is an ordered
array of the average credit scores of
47 cities. Complete parts (a) through (c) below.
a) Construct a frequency distribution and a percentage
distribution that have class intervals with the upper class
For Expert help and assignment solutions, +254707240657
QBA FINAL Questions and Answers (100%
Correct Answers) Already Graded A+
Businesses in a country are listed by size: small, medium, and large.
Explain why business size is an example of an ordinal-scaled
variable. [ Ans: ] The size of a business is ordinal-scaled because
it has values that can be used as an order or rank of a categorical
variable.
© 2025 Assignment Expert
Suppose that you measure the time it takes to download a video
from the internet.
a. Explain why the download time is a continuous numerical
variable.
Guru01 - Stuvia
b. Explain why the download time is a ratio scaled variable. [
Ans: ] a) Download time is a continuous numerical variable
because it has numerical values that arise from a measuring
process.
b) Download times are numerical values that imply order and also
have a true zero point.
You want to select a random sample of
n=1 from a population of three items (which are called A, B, and
C). The rule for selecting the sample is as follows: Flip a coin; if it is
heads, pick item A; if it is tails, flip the coin again; this time, if it is
heads, choose B; if it is tails, choose C. Explain why this is a
probability sample but not a simple random sample. [ Ans: ] This
is a probability sample because the probability of each outcome
is known, but it is not a simple random sample because there is a
higher probability of picking item A than there is of picking item B
or of picking item C.
A hotel management company runs 10 hotels in a resort area. The
hotels have a mix of pricing—some hotels have budget-priced
, 2
For Expert help and assignment solutions, +254707240657
rooms, some have moderate-priced rooms, and some have
deluxe-priced rooms. Data are collected that indicate the
number of rooms that are occupied at each hotel on each day of
a month. Explain how the 10 hotels can be recoded into these
three price categories. [ Ans: ] Create three new categorical
variables, one for each type of priced room. Determine which
hotels include budget-priced rooms and reassign all data for
those hotels to a new categorical variable, budget-priced hotels.
Determine which hotels include moderate-priced rooms and
reassign all data for those hotels to a new categorical variable,
moderate-priced hotels. Determine which hotels include deluxe-
priced rooms and reassign all data for those hotels to a new
© 2025 Assignment Expert
categorical variable, deluxe-priced hotels.
A recent corporate survey indicated that companies that
acknowledge the supply chain as a strategic asset achieve 70%
higher performance. The "Leaders" in the survey point to next-
Guru01 - Stuvia
generation supply chains, which are fast, flexible, and responsive.
They are more concerned with skills that separate a company
from the crowd: 51% say differentiating capabilities is the real key
to success. What additional information would you want to know
about the survey before you accepted the results of the study? [
Ans: ] A. What was the margin of error and sample size?
B. Who funded the study?
C. What sampling design was used?
D. (NOT D)
E. What was the population from which the sample was selected?
F. What was the response rate?
How do the average credit scores of people living in different
cities differ? The data in the accompanying table is an ordered
array of the average credit scores of
47 cities. Complete parts (a) through (c) below.
a) Construct a frequency distribution and a percentage
distribution that have class intervals with the upper class
