Statistics
A questionnaire contained a question regarding marital status. The respondent checked either single, married, divorced, separated or widowed. What is the scale of measurement for this question?
D
For a set of grouped or ungrouped data, which measures of central location always have only one value?
D
Respondents were asked, "Do you now earn more than or less than you did five years ago?" What is this level of measurement?
D
The Nielsen Ratings break down the number of people watching a particular television show by age. Age is what level of measurement
D
The incomes of a group of 50 loan applicants are obtained. Which level of measurement is income?
D
What is the median of 26, 30, 24, 32, 32, 31, 27 and 29?
D
What level of measurement is a bar code
D
What level of measurement is the number of auto accidents reported in a given month?
D
What level of measurement is the price of an admission ticket to a movie theater?
D
Which measure of central location is used to determine an average annual percent increase?
D
Which word is NOT part of the definition of descriptive statistics?
D
Your height and weight are examples of which level of measurement
D
In the calculation of the arithmetic mean for grouped data, which value is used to represent all the values in a particular class?
E
A parameter is a measurable characteristic of a sample
F
A set of ordinal, interval or ratio level data may only have one mode
F
A statistic is a measurable characteristic of the population
F
A store asks shoppers for their zip code to identify market areas. Zip codes are an example of ratio data
F
A variable measured at the interval or ratio level can have more than one arithmetic mean
F
Another name for inductive statistics is descriptive statistics
F
Categorizing voters as Democrats, Republicans and Independents is an example of interval level measurement
F
Extremely high or low scores affect the value of the median
F
For a set of data arranged or sorted in numerical order, the value of the observation in the center is called the weighted mean
F
For a symmetrical distribution, the variance is equal to the standard deviation
F
For any distribution, there are an equal number of values above the mean and below it
F
For salaries of $102,000, $98,000, $45,000, $106,000 and $101,000, the arithmetic mean would be an appropriate average
F
If we find the deviation of each value from the median, the sum of these deviations is always zero
F
If we select 100 persons out of 25,000 registered voters and question them about candidates and issues, the 100 persons are referred to as the population
F
In a company, the standard deviation of the ages of female employees is six years and the standard deviation of the ages of male employees is ten years. These statistics indicate that there is more spread in the ages of the female employees
F
In a negatively skewed distribution, the mean is always greater than the median
F
In a positively skewed distribution, the mode is greater than the median
F
Ordinal level of measurement is considered the "lowest" level of measurement
F
The Union of Electrical Workers of America with 9,128 members polled 362 members regarding a new wage package to be submitted to management. The population is the 362 members
F
The branch of mathematics used to facilitate the collection, organization, presentation, analysis and interpretation of numerical data is referred to as a statistic
F
The mean absolute deviation is the most widely used measure of dispersion
F
The mean deviation is the mean of the actual values of the deviations from the arithmetic mean
F
The order that runners finish in a race would be an example of continuous data
F
The techniques used to find out something about a population, such as their average weight, based on a sample are referred to as descriptive statistics
F
The variance is the mean of the sum of the squared deviations between each observation and the median.
F
The words descriptive statistics and inferential statistics can be used interchangeably
F
There are four levels of measurement-qualitative, quantitative, discrete, and continuous
F
Based on a sample of 3,000 people, the civilian unemployment rate in the United States was 5.5%. 5.5% is referred to as a statistic
T
Chebyshev's Theorem gives the proportion of observations in any data set that occurs within k standard deviations of the mean, where k is greater than 1.0
T
Data that can only be classified into categories is nominal data
T
Dispersion is the degree of variation in the data
T
For a data set with an even number of ungrouped values, half of the values will be less than the median
T
For a data set with an even number of ungrouped values, the median is the arithmetic mean of the two middle values
T
If a frequency distribution is open-ended, the variance cannot be determined.
T
If a variable is measured at the interval or ratio level, all the values are included when computing the mean
T
In a negatively skewed distribution, the mean is smaller than the median or mode and the mode occurs at the peak of the curve
T
Ordinal level of measurement implies some sort of ranking.
T
Statistics is defined as a body of techniques used to facilitate the collection, organization, presentation, analysis and interpretation of information for the purpose of making better decisions.
T
The CIA World Factbook cited these numbers for the U.S:
T
The Empirical states that about 68% of the observation will lie within one standard deviation of the mean; about 95% of the observations will lie within two standard deviations of the mean; and virtually all (99.7%) will lie within three standard deviations of the mean
T
The arithmetic mean is the sum of the observations divided by the total number of observations
T
The geometric mean is the nth root of n observations.
T
The median can be determined for any set of interval-level data.
T
The mode is the value of the observation that appears most frequently.
T
The number of children in a family is a discrete variable
T
The principal difference between the interval and ratio scale is that the ratio scale has a meaningful zero point
T
The range cannot be computed for data grouped in a frequency distribution having an open end
T
The standard deviation is the positive square root of the variance
T
The sum of the deviations from the mean for the set of numbers 4, 9 and 5 will equal zero
T
Three persons earn $8 an hour, six earn $9 an hour, and one earns $12 an hour. The weighted mean hourly wage is $9
T
To infer something about a population, we usually take a sample from the population
T
A population is a collection of all individuals, objects, or measurements of interest
t
A negatively skewed distribution is not symmetrical. The long tail is to the left or in the negative direction
T
A sample is a portion or part of the population of interest
T
A value that is typical or representative of the data is referred to as a measure of central location
T
Fifteen accounting majors had an average grade of 90 on a finance exam. Seven marketing majors averaged 85, while ten finance majors averaged 93 on the same exam. What is the weighted mean for the 32 students taking the exam?
A
For a data set, half of the observations are always greater than the ________
A
If Gallup, Harris and other pollsters asked people to indicate their political party affiliation - Democrat, Republican or Independent, the data gathered would be an example of which scale of measurement?
A
The Equal Employment Opportunity Act requires employers to classify their employees by gender and national origin. Which level of measurement is this
A
The general process of gathering, organizing, summarizing, analyzing, and interpreting data is
A
The main purpose of descriptive statistics is to
A
The members of each basketball team wear numbers on the back of their jerseys. What scale of measurement are these numbers considered?
A
The names of the positions on a hockey team, such as forward and goalie, are examples of what level of measurement?
A
What is the relationship among the mean, median and mode in a symmetric distribution
A
Which of the following is an example of a continuous variable?
A
A bank asks customers to evaluate the drive-thru service as good, average, or poor. Which level of measurement is this classification?
B
A group of women tried five brands of hair spray and ranked them according to preference. What level of measurement is this
B
For which measure of central location will the sum of the deviations of each value from the data's average will always be zero?
B
The final rankings of the top 20 NCAA college basketball teams are an example of which level of measurement?
B
What is a portion or part of a population called?
B
What is the lowest level of measurement that a median can be computed
B
What type of variable is "projected return on an investment
B
What type of variable is the number of gallons of gasoline pumped by a filling station during a day?
B
Which one of the following is referred to as the population mean?
B
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.
C
For an ungrouped data set with an odd number of observations that have been sorted or arrayed from smallest to largest values, where is the median located?
C
If a frequency distribution has open-ended intervals at the extremes, which measure of central location is the most difficult to estimate?
C
Shoe sizes, such as 7B, 10D and 12EEE, are examples of what level of measurement
C
The reported unemployment is 5.5% of the population. What type of scale is used to measure unemployment
C
What level of measurement are the Centigrade and Fahrenheit temperature scales?
C
What type of variable is the number of robberies reported in your city?
C
When TV advertisements report "2 out of 3 dentists surveyed indicated they would recommend Brand X toothpaste to their patients," an informed consumer may question the conclusion because: A) The sample was only 5 dentists
C
Which measures of central location are not affected by extremely small or extremely large values
C
Which of the following is an example of attribute data?
C
Which one of the following is NOT an example of discrete data?
C
A distribution that has the same shape on either side of the center is said to be symmetrical
T
A marketing research agency was hired to test a new DVD player. Consumers rated it outstanding, very good, fair or poor. The level of measurement for this experiment is ordinal
T
