Date File 1
Chapter One
Determine whether the evaluated group is a population or a sample
Based on a randomly selected group of 500 patients with high cholesterol, it was found that 67% have heart disease. Is this a population or a sample; explain your answer.
An investigation of 150 randomly selected local restaurants concluded that 42% of local restaurants have serious health code violations. Is this a population or a sample; explain your answer.
Determine whether the given value is a statistic or a parameter.
A researcher determines that 42.7% of all downtown office buildings have ventilation problems. Is this a statistic or a parameter; explain your answer. This is an example of a statistic.
After taking the first exam, 15 of the students dropped the class. Is this a statistic or a parameter; explain your answer.
Identify the type of sampling used.
A tax auditor selects every 1000^{th} income tax return that is received. What type of sample is this and why?
The name of each contestant is written on a separate card, and the cards are placed in a bag with three names being picked from the bag. What type of sample is this and why?
Is the study experimental or observation and why?
A political pollster reports that his candidate has a 10% lead in the polls with 10% undecided.
Date File 1
Chapter One
Determine whether the evaluated group is a population or a sample
Based on a randomly selected group of 500 patients with high cholesterol, it was found that 67% have heart disease.