- 10.1: . If you plan to use a 0.05 significance level in a test of a corre...
- 10.2: The linear correlation coefficient r is found to be 0.585. What sho...
- 10.3: The sample data result in a linear correlation coeffient of r = 0.5...
- 10.4: Repeat the preceding exercise assuming that the linear correlation ...
- 10.5: Given that the linear correlation coefficient r is found to be 0.58...
- 10.6: True or false: If there is no linear correlation between systolic a...
- 10.7: True or false: If the sample data lead us to the conclusion that th...
- 10.8: . If each systolic reading is exactly twice the diastolic reading, ...
- 10.9: If you had computed the value of the linear correlation coefficient...
- 10.10: If the sample data were to result in the scatterplot shown here, wh...
Solutions for Chapter 10: Correlation and Regression
Full solutions for Elementary Statistics | 12th Edition
a-error (or a-risk)
In hypothesis testing, an error incurred by failing to reject a null hypothesis when it is actually false (also called a type II error).
All possible (subsets) regressions
A method of variable selection in regression that examines all possible subsets of the candidate regressor variables. Eficient computer algorithms have been developed for implementing all possible regressions
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
Analysis of variance (ANOVA)
A method of decomposing the total variability in a set of observations, as measured by the sum of the squares of these observations from their average, into component sums of squares that are associated with speciic deined sources of variation
Attribute control chart
Any control chart for a discrete random variable. See Variables control chart.
See Arithmetic mean.
A chart used to organize the various potential causes of a problem. Also called a ishbone diagram.
Conditional probability mass function
The probability mass function of the conditional probability distribution of a discrete random variable.
A tabular arrangement expressing the assignment of members of a data set according to two or more categories or classiication criteria
A measure of association between two random variables obtained as the expected value of the product of the two random variables around their means; that is, Cov(X Y, ) [( )( )] =? ? E X Y ? ? X Y .
The value of a statistic corresponding to a stated signiicance level as determined from the sampling distribution. For example, if PZ z PZ ( )( .) . ? =? = 0 025 . 1 96 0 025, then z0 025 . = 1 9. 6 is the critical value of z at the 0.025 level of signiicance. Crossed factors. Another name for factors that are arranged in a factorial experiment.
Another name for factors that are arranged in a factorial experiment.
A probability distribution for a discrete random variable
Discrete random variable
A random variable with a inite (or countably ininite) range.
Erlang random variable
A continuous random variable that is the sum of a ixed number of independent, exponential random variables.
In statistical quality control, that portion of a number of units or the output of a process that is defective.
Gamma random variable
A random variable that generalizes an Erlang random variable to noninteger values of the parameter r
Another name for the normal distribution, based on the strong connection of Karl F. Gauss to the normal distribution; often used in physics and electrical engineering applications
Effects in a fractional factorial experiment that are used to construct the experimental tests used in the experiment. The generators also deine the aliases.
Geometric random variable
A discrete random variable that is the number of Bernoulli trials until a success occurs.