# Question: An experiment to study the relationship between x time

An experiment to study the relationship between x = time spent exercising (minutes) and y 5 amount of oxygen consumed during the exercise period resulted in the following summary statistics.

a. Estimate the slope and y intercept of the population regression line.

b. One sample observation on oxygen usage was 757 for a 2-minute exercise period. What amount of oxygen consumption would you predict for this exercise period, and what is the corresponding residual?

c. Compute a 99% confidence interval for the average change in oxygen consumption associated with a 1- minute increase in exercise time.

a. Estimate the slope and y intercept of the population regression line.

b. One sample observation on oxygen usage was 757 for a 2-minute exercise period. What amount of oxygen consumption would you predict for this exercise period, and what is the corresponding residual?

c. Compute a 99% confidence interval for the average change in oxygen consumption associated with a 1- minute increase in exercise time.

## Answer to relevant Questions

The paper “The Effects of Split Keyboard Geometry on Upper Body Postures” (Ergonomics [2009]: 104–111) describes a study to determine the effects of several keyboard characteristics on typing speed. One of the ...The accompanying data were read from a plot (and are a subset of the complete data set) given in the article “Cognitive Slowing in Closed-Head Injury” (Brain and Cognition [1996]: 429– 440). The data represent the mean ...The article “Vital Dimensions in Volume Perception: Can the Eye Fool the Stomach?” (Journal of Marketing Research [1999]: 313– 326) gave the accompanying data on the dimensions of 27 representative food products ...Example 13. 3 gave data on x = proportion who judged candidate A as more competent and y = vote difference proportion. Calculate a 95% confidence interval for the mean vote-difference proportion for congressional races where ...For the cereal data of the previous exercise, the mean x value is 19.21. Would a 95% confidence interval with x* = 20 or x* = 17 be wider? Explain. Answer the same question for a prediction interval.Post your question