Question: When H0 is true this statistic has a t distribution
When H0 is true, this statistic has a t distribution based on (n + m – 4) df. The data below are a subset of the data in the article “Diet and Foraging Model of Bufa marinus and Leptodactylus ocellatus” (Journal of Herpetology : 138– 146). The independent variable x is body length (cm) and the dependent variable y is mouth width (cm), with n = 9 observations for one type of nocturnal frog and m = 8 observations for a second type. Carry out a test to determine if the slopes of the true regression lines for the two different frog populations are equal. Use a sigificance level of .05. (Summary statistics are also given in the accompanying table.)
Relevant QuestionsConsider the following four (x, y) data sets: the first three have the same x values, so these values are listed only once (from "Graphs in Statistical Analysis," American Statistician : 17- 21) For each of these data ...The authors of the paper “Weight-Bearing Activity during Youth Is a More Important Factor for Peak Bone Mass than Calcium Intake” (Journal of Bone and Mineral Research , 1089–1096) studied a number of variables ...Consider a regression analysis with three independent variables x1, x2, and x3. Give the equation for the following regression models: a. The model that includes as predictors all independent variables but no quadratic or ...This exercise requires the use of a computer package. The paper “Habitat Selection by Black Bears in an Intensively Logged Boreal Forrest” (Canadian Journal of Zoology : 1307–1316) gave the accompanying data on n ...The article “The Undrained Strength of Some Thawed Permafrost Soils” (Canadian Geotechnical Journal : 420–427) contained the accompanying data (see page 830) on y = shear strength of sandy soil (kPa), x1 = depth ...
Post your question