# Statstics 8104-8 Data File 1 - 63480

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Date File 1

Chapter One

1. Determine whether the evaluated group is a population or a sample

1. 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.

2. 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.

2. Determine whether the given value is a statistic or a parameter.

1. 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.

2. After taking the first exam, 15 of the students dropped the class.  Is this a statistic or a parameter; explain your answer.

3. Identify the type of sampling used.

1. A tax auditor selects every 1000th income tax return that is received.  What type of sample is this and why?

2. 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?

4. Is the study experimental or observation and why?

1. A political pollster reports that his candidate has a 10% lead in the polls with 10% undecided.

Solution Description

Date File 1

Chapter One

1. Determine whether the evaluated group is a population or a sample

1. Based on a randomly selected group of 500 patients with high cholesterol, it was found that 67% have heart disease.

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