- 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 statistical hypothesis testing, this is a hypothesis other than the one that is being tested. The alternative hypothesis contains feasible conditions, whereas the null hypothesis speciies conditions that are under test
A study in which a sample from a population is used to make inference to a future population. Stability needs to be assumed. See Enumerative study
Attribute control chart
Any control chart for a discrete random variable. See Variables control chart.
An estimator for a parameter obtained from a Bayesian method that uses a prior distribution for the parameter along with the conditional distribution of the data given the parameter to obtain the posterior distribution of the parameter. The estimator is obtained from the posterior distribution.
Conditional probability density function
The probability density function of the conditional probability distribution of a continuous random variable.
Conditional probability mass function
The probability mass function of the conditional probability distribution of a discrete random variable.
A two-dimensional graphic used for a bivariate probability density function that displays curves for which the probability density function is constant.
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.
A term used for the quantity ( / )( ) 1 1 2 n xi i n ? = that is subtracted from xi i n 2 ? =1 to give the corrected sum of squares deined as (/ ) ( ) 1 1 2 n xx i x i n ? = i ? . The correction factor can also be written as nx 2 .
Formulas used to determine the number of elements in sample spaces and events.
Cumulative normal distribution function
The cumulative distribution of the standard normal distribution, often denoted as ?( ) x and tabulated in Appendix Table II.
A parameter in a tabular CUSUM algorithm that is determined from a trade-off between false alarms and the detection of assignable causes.
Used in statistical quality control, a defect is a particular type of nonconformance to speciications or requirements. Sometimes defects are classiied into types, such as appearance defects and functional defects.
Deming’s 14 points.
A management philosophy promoted by W. Edwards Deming that emphasizes the importance of change and quality
Discrete uniform random variable
A discrete random variable with a inite range and constant probability mass function.
The amount of variability exhibited by data
A study in which a sample from a population is used to make inference to the population. See Analytic study
A type of experimental design in which every level of one factor is tested in combination with every level of another factor. In general, in a factorial experiment, all possible combinations of factor levels are tested.
Finite population correction factor
A term in the formula for the variance of a hypergeometric random variable.
Geometric random variable
A discrete random variable that is the number of Bernoulli trials until a success occurs.