Exam 15: Understanding Relationships - Numerical Data Part 2

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When the four basic assumptions for a simple linear regression model are satisfied, a)What is μ_b equal to? b)What is σ_b equal to? c)What is the shape of the sampling distribution of b? d)What is the probability distribution of the standardized variable, ?

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Question 41

A study was carried out to investigate the relationship between x = the number of components needing repair and y = the time of the service call (in minutes) for a computer repair company. The number of components and the service times for a random sample of 20 service calls were used to fit a simple linear regression model. Partial computer output is shown below. The regression equation is Time = 32.441 + 11.6205 Number S=19.058, R-Sq=91.3%, R-Sq(adj)=90.0% One of the numbers in the above computer output indicates the percentage of the observed variation in the service call times that can be explained by the linear relationship between service call time and number of components needing repair. What is the value of this number?

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Question 42

If there is no evidence of a linear relationship between x and y, what decision will be made in a test of ?

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Question 43

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When the four basic assumptions for a simple linear regression model are satisfied, a)What is μ_b equal to? b)What is σ_b equal to? c)What is the shape of the sampling distribution of b? d)What is the probability distribution of the standardized variable, ?

If there is no evidence of a linear relationship between x and y, what decision will be made in a test of ?

Collecting Data in Reasonable Ways

Graphical Methods for Describing Data Distributions

Numerical Methods for Describing Data Distributions

Describing Bivariate Numerical Data

Probability

Random Variables and Probability Distributions

An Overview of Statistical Inference - Learning From Data

Sampling Variability and Sampling Distributions

Estimating a Population Proportion

Asking and Answering Questions About a Population Proportion

Asking and Answering Questions About the Difference Between Two Proportions

Asking and Answering Questions About a Population Mean

Asking and Answering Questions About the Difference Between Two Means

Learning From Categorical Data

Asking and Answering Questions About More Than Two Means

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Exam 15: Understanding Relationships - Numerical Data Part 2

When the four basic assumptions for a simple linear regression model are satisfied, a)What is μb equal to? b)What is σb equal to? c)What is the shape of the sampling distribution of b? d)What is the probability distribution of the standardized variable, ?

If there is no evidence of a linear relationship between x and y, what decision will be made in a test of ? ​

Collecting Data in Reasonable Ways

Graphical Methods for Describing Data Distributions

Numerical Methods for Describing Data Distributions

Describing Bivariate Numerical Data

Probability

Random Variables and Probability Distributions

An Overview of Statistical Inference - Learning From Data

Sampling Variability and Sampling Distributions

Estimating a Population Proportion

Asking and Answering Questions About a Population Proportion

Asking and Answering Questions About the Difference Between Two Proportions

Asking and Answering Questions About a Population Mean

Asking and Answering Questions About the Difference Between Two Means

Learning From Categorical Data

Asking and Answering Questions About More Than Two Means

Filters

When the four basic assumptions for a simple linear regression model are satisfied, a)What is μ_b equal to? b)What is σ_b equal to? c)What is the shape of the sampling distribution of b? d)What is the probability distribution of the standardized variable, ?

If there is no evidence of a linear relationship between x and y, what decision will be made in a test of ?