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20 terms

Bus 220 chapter 1

terms
STUDY
PLAY
The main purpose of descriptive statistics is to
summarize data in a useful and informativie manner
The incomes of a group of 50 loan applications are obtained. Which level of measurement is income?
Ratio
When TV advertisements report "2 our of 3 dentists surveyed indicated they would recommend Brand X toothpaste to their patients" an informed consumer may question the conclusion because
the advertisement does not include the total number of dentists surveyed
A bank asks customers to evaluate the drive-thru service as good, average, or poor. Which level of measurement is this classification?
Ordinal
What is a portion or part of a population called?
sample
A marketing class of 50 students evaluated the instructor using the following scale: superior, good, average, poor, and inferior. The descriptive summary showed the following survey results: 2 % superior, 8% good, 45% average, 45 % poor, and 0% inferior.
Most students rated the instructor as poor or average
Which word is not part of the devinition of descriptive statistics? Organizing, Analyzing, Presenting, Predicting
Predicting
The reported unemployment is 5.5% of the population. What type of scale is used to measure unemployment?
Interval or ratio
What type of variable is the number of gallons of gasoline pumped by a filling station during a day?
Continuous
What type of variable is the number of robberies reported in your city
Discrete
Level of measurement:
The number of papers sold each Sunday during 2009
ratio
level of measurement
The departments, such as editorial, advertising, sports, etc
nominal
level of measurement:
A summary of the number of papers sold by county
ratio
level of measurement:
The number of years employed by the newspaper for each employee
ratio
sample or population:
the participants in a study of a new cholesterol drug?
sample
sample of population:
the drivers who received a speeding ticket in Kansas City last month
population
sample or population
Those on welfare in Cook County (chicago) Illinois
population
sample or population
the 30 stocks reported as a part of the Dow Jones Industrial Average
sample
In a marketing study, 100 consumers were asked to select the best digital music player from the iPod, the iRiver, and the Magic Star MP3. To summarize the consumer responses with a frequency table, how many classes would the frequency table have?
3
A set of data consists of 45 observations between $0 and $29.
a. how many classes would you recommend for the frequency distribution?
b. What class interval would you recommend? Round your answer to the nearest whole number?
a. 6 (use the 2 to the K rule 2^6)
b. 5 (29-0/6= 4.83 or 5