A retail chain lines its parking lots depending on the types of vehicles driven
ID: 3049406 • Letter: A
Question
A retail chain lines its parking lots depending on the types of vehicles driven by local shoppers. Large trucks and SUVs require bigger spots than compact cars. Each day, while collecting shopping carts, an employee records a list of the types of vehicles in the lot. Let the variable "Type" record whether a vehicle is a compact car, regular car, SUV, or large truck.
(a) Identify whether the data are cross sectional or a time series.
(b) Indicate if the variable is categorical, ordinal, or numerical (If a variable is numerical, include its units if possible).
(c) List any concerns that you might have for the accuracy of the data.
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(a) The data are (cross sectional or a time series.)
(b) Determine the variable type and, if numerical, the units, if possible.
Variable Name
Type
Type and Units
(categorical/numerical; days/numerical; vehicles/numerical; dollars/ordinal)
(c) List any concerns. Select all that apply.
A.
Some shoppers may have more than one vehicle.
B.
The employee may only record the type for vehicles passed while collecting carts, not all the vehicles in the lot.
C.
The mix of vehicles may be different on different days of the week and the employee may only work certain days.
D.
There are no concerns regarding the accuracy of the data.
Variable Name
Type
Type and Units
(categorical/numerical; days/numerical; vehicles/numerical; dollars/ordinal)
Explanation / Answer
a)
Data is collected on the types of vehicles
this is cross sectional data
Time is not relavant for this data and hence cannot be time series data.
b)
from the given information, the variable is type of vehicle which is categorical data
c)
this data is only about the more frequent vehicles the chain cannot ignore the vehicles
which are not parked
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