Term
Equal Variance Rule of Thumb: if the larger sample variance is more than twice as large as the smaller sample variance then the population variances are ___ 

Definition


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What is the distribution we use for calculating a confidence interval around a single variance of normally distributed population? 

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A ___ ___ is a single numerical value used to estimate the corresponding population parameter 

Definition


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As you increase your confidence level, the width of the confidence interval ___ 

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As you increase your sample size, the standard error ___ 

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Term
The ___ population is the population from which one actually draws a sample whereas the ___ population is the one which one wishes to make an inference 

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___ ___ is the procedure by which we reach a conclusion about a population on the basis of the information contained in a sample drawn from that population. 

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An ___ ___ consists of two numerical values defining a range of values that, with a specified degree of confidence, most likely includes the parameter being estimated. 

Definition


Term
The quantity obtained by multiplying the reliability factor by the standard error of the mean is called the ___ of the estimate. This quantity is also called the __________. 

Definition
precision; margin of error 


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A specific value computed from a sample that is used in deciding between H0 and HA is a ___ ___ 

Definition


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If you fail to reject a null that is incorrect, what kind of error have you made? 

Definition
Type 2 error (false negative) 


Term
If the test statistic does not fall into the rejection region, what is our statistical decision? 

Definition
Fail to reject the null hypothesis 


Term
The significance level is represented by the Greek letter ___ 

Definition


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Given α, one way to reduce B, p(type II error), is to increase the ___ ___ 

Definition


Term
What is the probability of failing to reject a false null hypothesis? 

Definition


Term
What is the probability of rejecting a false null? 

Definition


Term
What type of error have you made if you reject a null hypothesis that is true? 

Definition
Type 1 error (false positive) 


Term
A ___ may be defined simply as a statement about one or more populations. 

Definition


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The level of significance ___ is a probability and in fact is the probability of rejecting a true null hypothesis 

Definition


Term
The error committed when a true null hypothesis is rejected is called the ___ ___ error. 

Definition


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The ___ ___ error is the error committed when a false null hypothesis is not rejected. 

Definition


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A ___ ___ is the probability that the computed value of a test statistic is at least as extreme as a specified value of the test statistic when the null hypothesis is true. Thus, the ___ ___ is the smallest value of a for which we can reject a null hypothesis. 

Definition


Term
Which equation would you use for this problem: The goal of a study by Klingler et al. (A2) was to determine how symptom recognition and perception influence clinical presentation as a function of race. They characterized symptoms and careseeking behavior in AfricanAmerican patients with chest pain seen in the emergency department. One of the presenting vital signs was systolic blood pressure. Among 157 AfricanAmerican men, the mean systolic blood pressure was 146 mm Hg with a standard deviation of 27. We wish to know if, on the basis of these data, we may conclude that the mean systolic blood pressure for a population of African American men is greater than 140. 

Definition

