How does a confidence interval differ from a prediction interval?
A) Confidence intervals are used to measure the accuracy of the mean response of all the individuals in the
population, while a prediction interval is used to measure the accuracy of a single individuals predicted
value.
B) Confidence intervals are used to measure the accuracy of a single individuals predicted value, while a
prediction interval is used to measure the accuracy of the mean response of all the individuals in the
population.
C) Confidence intervals are constructed about the predicted values of y while prediction intervals a
constructed about a particular value of x
D) Confidence intervals are constructed about the predicted values of x while prediction intervals a
constructed about a particular value of y
Question 2
One of the requirements for conducting inference on the least-squares regression model is that the
A) mean of the response variable changes at a constant rate while the standard deviation remains constant.
B) mean of the explanatory variable changes at a constant rate while the standard deviation remains
constant.
C) mean of the response variable remains constant while the standard deviation changes at a constant rate.
D) mean of the explanatory variable remains constant while the standard deviation changes at a constant
rate.
School-age children are often independent and industrious, with a developing sense of self-confidenc
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Sketch a graph of the function h(x), by hand on the following interval: