In a survey of 1000 adults, 34% found they prefer charcoal to gas grills. The 34% would be considered a:

In a survey of 1000 adults, 34% found they prefer charcoal to gas grills. The 34% would be considered a:

 

  Statistic

 

  Population

 

  Parameter

 

  Sample

 

 Question 2The chances of winning the Maryland lottery are one chance in twenty-two million. The probability would be considered an example of:

 

  Inferential statistics

 

  Experiment design

 

  Descriptive statistics

 

  A sample

 

Question 3 The milligrams of tar in 30 cigarettes would be considered:

 

  Ordinal data

 

  Nominal data

 

  Interval data

 

  Ratio data

 

Question 4The ratings of 50 movies would be considered:

 

  Ordinal data

 

  Interval data

 

  Ratio data

 

  Quantitative data

 

Question 5A researcher randomly selects and interviews fifty male and fifty female teachers. This sampling technique is called:

 

  Cluster

 

  Random

 

  Convenience

 

  Stratified

 

 Question 6Cameras are set up to watch an intersection and determine how many cars are let through with each green light interval. This study design would be considered:

 

  Survey

 

  Simulation

 

  Experimental

 

  Observational

 

Question 7Which of the following would be the mean of this data set: 5, 7, 12, 36, 14, 12, 33, 21

 

  13.00

 

  11.6

 

  17.5

 

  11.4

 

Question 8Which of the following would be the variance of this population data set: 3, 6, 8, 9, 4, 5, 7, 1, 9, 7, 5, 4, 3, 1

 

  2.66

 

  6.55

 

  7.05

 

  2.56

 

Question 9If a data set is right skewed, where would the mean be in relation to the mode?

 

  Right skewed distributions don’t have a mean nor mode

 

  At a higher value

 

  At the same value

 

  At a lower value

 

Question 10In a normally distributed data set with a mean of 24 and a standard deviation of 4.2, what percentage of the data would be between 19.8 and 28.2 and why?

 

  68% based on the Empirical Rule

 

  68% based on the histogram

 

  95% based on the Empirical Rule

 

  95% based on the histogram

 

 Question 11Which data outcome of the speed of cars would best support installing a speed bump?

 

  High mean with small standard deviation

 

  Low mean with small standard deviation

 

  High mean with high standard deviation

 

  Low mean with high standard deviation

 

Question 12In manufacturing, stratified sampling could be used to determine if the machines are operating correctly. Which of the following best describes this type of sampling?

 

  Every 10th product in the line is selected

 

  Samples are randomly selected throughout the day

 

  Products are put into groups and some are randomly selected from each group

 

  Products are put into groups and all are included from several randomly selected groups

 

Question 13A graph shows the ten’s digit on the left and the one’s digits on the right. This graphic is most likely to be:

 

  A frequency polygon

 

  A dot plot

 

  A frequency histogram

 

  A stem-leaf plot

 

Question 14Match the terms and their definitions

 

Vertical bar chart that shows frequency on the y-axis

 

A sample where the population is divided into groups and several groups are randomly selected from all from those selected groups are sampled

 

Collection of all counts that are of interest

 

A subset or part of a population

 

A sample where the population is divided into groups and several are randomly sampled form each group

 

Consists of attributes, labels, or nonnumerical entries

 

Question 15Match the terms and their definitions

 

The most frequent number appearing in a dataset

 

The average

 

The percentage of data that falls within 1, 2, or 3 standard deviations of the mean in a symmetrical, bell-shaped distribution

 

The square root of the variance

 

Show how far a particular data point is from the mean in terms of the number of standard deviations