- 3-3.1: Which measures of position could be used to help describe the data ...
- 3-3.2: If 40% of the mice in the top quartile survived after the injection...
- 3-3.3: What information can be given from using percentiles?
- 3-3.4: What information can be given from using quartiles?
- 3-3.5: What information can be given from using standard scores?
- 3-3.1: What is a z score?
- 3-3.2: Define percentile rank
- 3-3.3: What is the difference between a percentage and a percentile?
- 3-3.4: Define quartile.
- 3-3.5: What is the relationship between quartiles and percentiles?
- 3-3.6: What is a decile?
- 3-3.7: How are deciles related to percentiles?
- 3-3.8: To which percentile, quartile, and decile does the median correspond?
- 3-3.9: Vacation Days If the average number of vacation days for a selectio...
- 3-3.10: Age of Senators The average age of senators in the 108th Congress w...
- 3-3.11: Exam Scores A final examination for a psychology course has a mean ...
- 3-3.12: Teachers Salary The average teachers salary in a particular state i...
- 3-3.13: Which has a better relative position: a score of 75 on a statistics...
- 3-3.14: Test Scores A student scores 60 on a mathematics test that has a me...
- 3-3.15: Which score indicates the highest relative position? a. A score of ...
- 3-3.16: College Room and Board Costs Room and board costs for selected scho...
- 3-3.17: Using the data in Exercise 16, find the approximate percentile rank...
- 3-3.18: Achievement Test Scores (ans) The data shown represent the scores o...
- 3-3.19: For the data in Exercise 18, find the approximate scores that corre...
- 3-3.20: Airplane Speeds (ans) The airborne speeds in miles per hour of 21 p...
- 3-3.21: Using the data in Exercise 20, find the approximate percentile rank...
- 3-3.22: Average Weekly Earnings The average weekly earnings in dollars for ...
- 3-3.23: For the data from Exercise 22, what value corresponds to the 40th p...
- 3-3.24: Test Scores Find the percentile rank for each test score in the dat...
- 3-3.25: In Exercise 24, what value corresponds to the 60th percentile?
- 3-3.26: Hurricane Damage Find the percentile rank for each value in the dat...
- 3-3.27: What value in Exercise 26 corresponds to the 40th percentile?
- 3-3.28: Test Scores Find the percentile rank for each test score in the dat...
- 3-3.29: What test score in Exercise 28 corresponds to the 33rd percentile?
- 3-3.30: Using the procedure shown in Example 337, check each data set for o...
- 3-3.31: Another measure of average is called the midquartile; it is the num...
Solutions for Chapter 3-3: Data Description
Full solutions for Elementary Statistics: A Step by Step Approach | 7th Edition
In a fractional factorial experiment when certain factor effects cannot be estimated uniquely, they are said to be aliased.
Attribute control chart
Any control chart for a discrete random variable. See Variables control chart.
Chi-square (or chi-squared) random variable
A continuous random variable that results from the sum of squares of independent standard normal random variables. It is a special case of a gamma random variable.
An experiment in which the treatments (experimental conditions) that are to be studied are included in the experiment. The data from the experiment are used to evaluate the treatments.
Conditional probability distribution
The distribution of a random variable given that the random experiment produces an outcome in an event. The given event might specify values for one or more other random variables
When a factorial experiment is run in blocks and the blocks are too small to contain a complete replicate of the experiment, one can run a fraction of the replicate in each block, but this results in losing information on some effects. These effects are linked with or confounded with the blocks. In general, when two factors are varied such that their individual effects cannot be determined separately, their effects are said to be confounded.
The probability 1?a associated with a conidence interval expressing the probability that the stated interval will contain the true parameter value.
Another term for the conidence coeficient.
Continuous uniform random variable
A continuous random variable with range of a inite interval and a constant probability density function.
A linear function of treatment means with coeficients that total zero. A contrast is a summary of treatment means that is of interest in an experiment.
A graphical display used to monitor a process. It usually consists of a horizontal center line corresponding to the in-control value of the parameter that is being monitored and lower and upper control limits. The control limits are determined by statistical criteria and are not arbitrary, nor are they related to speciication limits. If sample points fall within the control limits, the process is said to be in-control, or free from assignable causes. Points beyond the control limits indicate an out-of-control process; that is, assignable causes are likely present. This signals the need to ind and remove the assignable causes.
See Control chart.
Deming’s 14 points.
A management philosophy promoted by W. Edwards Deming that emphasizes the importance of change and quality
The response variable in regression or a designed experiment.
An experiment in which the tests are planned in advance and the plans usually incorporate statistical models. See Experiment
Another name for a cumulative distribution function.
Fixed factor (or fixed effect).
In analysis of variance, a factor or effect is considered ixed if all the levels of interest for that factor are included in the experiment. Conclusions are then valid about this set of levels only, although when the factor is quantitative, it is customary to it a model to the data for interpolating between these levels.
An arrangement of the frequencies of observations in a sample or population according to the values that the observations take on
A function that is used to determine properties of the probability distribution of a random variable. See Moment-generating function
The harmonic mean of a set of data values is the reciprocal of the arithmetic mean of the reciprocals of the data values; that is, h n x i n i = ? ? ? ? ? = ? ? 1 1 1 1 g .
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