Confidence interval for slope of population regression line

Reference no: EM131770348

Question: Beavers and beetles Refer to Exercise.

(a) How many clusters of beetle larvae would you predict in a circular plot with 5 tree stumps cut by beavers? Show your work.

(b) About how far off do you expect the prediction in part (a) to be from the actual number of clusters of beetle larvae? Justify your answer.

Exercise: Beavers and beetles Do beavers benefit beetles? Researchers laid out 23 circular plots, each 4 meters in diameter, at random in an area where beavers were cutting down cottonwood trees. In each plot, they counted the number of stumps from trees cut by beavers and the number of clusters of beetle larvae. Ecologists think that the new sprouts from stumps are more tender than other cottonwood growth, so that beetles prefer them. If so, more stumps should produce more beetle larvae.8 Minitab output for a regression analysis on these data is shown below. Construct and interpret a 99% confidence interval for the slope of the population regression line. Assume that the conditions for performing inference are met.

Regression Analysis: Beetle larvae versus Stumps

Predictor Coef SE Coef T P

Constant -1.286 2.853 -0.45 0.657

Stumps 11.894 1.136 10.47 0.000

S = 6.41939 R-Sq = 83.9% R-Sq(adj) = 83.1%

Reference no: EM131770348

Questions Cloud

What is expected shortfall : What is Expected Shortfall? Similarities and differences from Value @ risk? Using an assumed example, show how expected shortfall and VAR concept.

Prepare a comprehensive report directed to an australian asx : Students are required to prepare a comprehensive report directed to an Australian ASX Top 100 listed corporation

Conditions for performing inference about the slope : SAT Math scores, we examined data on the percent of high school graduates in each state who took the SAT and the state's mean SAT Math score in a recent year.

Application that calculate and displays membership fees : NIT5150 - Advanced Object Oriented Programming Assignment - Practical Programming Project. Create a C# application that calculate and displays membership fees

Confidence interval for slope of population regression line : Beavers and beetles Do beavers benefit beetles? Researchers laid out 23 circular plots, each 4 meters in diameter, at random in an area where beavers.

Compute the number of lamb quarter plants per meter : What is the equation of the least-squares regression line for predicting corn yield from the number of lamb's quarter plants per meter?

What height would predict for a student with an arm span : Ideal proportions Refer to Exercise. (a) What height would you predict for a student with an arm span of 76 inches? Show your work.

What is its in-stock probability : For 10 percent of the products in a category, a firm fails to satisfy all demand during the month. What is its in-stock probability?

Explain the major steps of effective team development : Explain the major steps of effective team development and why it is important.

User Account

All Pages