variables reduce the risk of attributing explanatory power to independent variables that in fact are not responsible for the occurrence of variation in the dependent variable. Select one: A. Spurious B. Explanatory C. Control D. Arbitrary

For the following pair of parameter and choice variable indicate whether the relationship is positive, negative, ambiguous, or no effect. Explain in a sentence or two. Ban on new housing and Filter rate

8. Trace metals in drinking water affect the flavor of the water, and un-usually high concentration can pose a health hazard. Table 1 shows trace-metal concentrations (zinc, in mg/L) for both surface water and bottom water at six different river locations. Our aim is to see if surface water concentration (x) is predictive of bottom water concentration (y). a. State the independent and dependent variable? b. State the Ho y HA c. Draw a scatter diagram to show a possible association between the concentrations and check to see if a linear model is justified. d. Calculate the correlation coefficient and provide your interpretation. e. Find the regression equation and pro your interpretation. Table 1 1123456 Location Bottom 0.430 0.266 0.567 0.531 0.707 0.716 Surface 0.415 0.238 0.390 0.410 0.605 0.609 I

Suppose you have access to a database with the variables listed below. Using the two variables BMI(the predictor) and diabetes(the outcome)  Name two types of descriptive statistics you could report specifying the variables BMI and diabetes.

O O O Less than 8 8. A sample of 400 Goshen households is selected and several variables are recorded. Which of the following statements is correct? * O Total household Income is a ratio level data. Socioeconomic status (recorded as "low income", "middle income", or "high income" is nominal level data. O The number of people living in a household is a continuous variable. O The primary language spoke in the household is ordinal level data.

Identify each of the following as either a parameter or a statistic, and give the correct notation. Proportion of students at your university that smoke, based on data from your class. Is it a parameter or statistic? What is the correct notation of the parameter or statistic? Average commute time for employees at a small company, based on interviews with all employees. Is it a parameter or statistic? What is the correct notation of the parameter or statistic?

The independent variable in either a before/after t or a within subjects F is always of what data scale

In a study measuring the frequency of pain scores of patients on a scale from 1 to 10 for a specific type of pain relief therapy, the pain score variable would best be described as which type of variable?     Dichotomous variable     Ordinal variable     Categorical variable     Continuous variable

COMPUTE BY HAND NOT EXCEL, GOOGLE SHEETS etc 5. Write a brief paragraph about whether the in-home counseling is equally effective as the out of home treatment for two separate groups. Here are the data. The out come variable is level of anxiety after treatment on a scale from 1-10 Total In-home treatment X Out of home treatment Y X2 Y2 XY 1 3 7 9 49 21 2 4 6 16 36 24 3 1 7 1 49 7 4 1 8 1 64 8 5 1 7 1 49 7 6 3 6 9 36 18 7 3 5 9 25 15 8 6 6 36 36 36 9 5 4 25 16 20 10 1 2 1 4 2 11 4 5 16 25 20 12 5 4 25 16…

Given the following pairs of value of the variables: Advertisement expenses and revenue generation (in million) of a hospital: (a) make a scatter diagram., (b) Do you think that there is any relationship between the variables? (c) Is it positive or negative? (d) is it high or low? and, (e) by graphic inspection draw an estimated line