1. Analyze the following statistical study. Highline’s Bistro in the student uni
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Question
1. Analyze the following statistical study.
Highline’s Bistro in the student union is interested in helping students eat more healthfully. They decide to track the following information about each student who makes a purchase:
· The time of day
· The type of food item
(Options are: drink, snack, or meal)
· A rating (by employees) of the “healthiness” of the food items
(Options are from 1 – little nutrition to 4 – very nutritious)
· The location of the food item in the display case
(Options are: one of High, middle, low AND one of left, center, or right)
· The amount a person spends
The employees chose one day, and one employee stayed behind the counter to record information about every third customer. A week later, they moved the healthiest items to the right side of the display case – closest to the cash register. On the same day of the week, the employees again recorded information about every third customer.
a) Describe the population of interest.
b) Describe the individuals in this study. (Remember, “individuals” can be people or objects.)
c) List one of the variables in this study.
d) Is this study observational or experimental? How did you decide?
e) Which data collection technique was used?
f) Which sampling method was used?
Highline’s Bistro in the student union is interested in helping students eat more healthfully. They decide to track the following information about each student who makes a purchase:
· The time of day
· The type of food item
(Options are: drink, snack, or meal)
· A rating (by employees) of the “healthiness” of the food items
(Options are from 1 – little nutrition to 4 – very nutritious)
· The location of the food item in the display case
(Options are: one of High, middle, low AND one of left, center, or right)
· The amount a person spends
The employees chose one day, and one employee stayed behind the counter to record information about every third customer. A week later, they moved the healthiest items to the right side of the display case – closest to the cash register. On the same day of the week, the employees again recorded information about every third customer.
Explanation / Answer
a) Population of interest are students who purchase food items
b) The individuals are students who make a food purchase. Every third customer was taken for the study. Other factors that are included in the study are the position of the food item in the display case and the healtiness of the food items.
c) One variable in the study is the Nutitional value of the food item bought.
d) This is an observational as the recorder doesnt have control on the purchaser or what he purchases. He can try various aspests of placing the items but he has no control on what the students purchases.
e) Data collection technique was census.
f) The sampling method is Sytematic Sampling with K =3
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