Homework Answers
Solution:
Enjoy Cilantro variable would follow the path:
categorical->nominal->indicator
Because In statistics, a categorical variable is a variable that can take on one of a limited, and usually fixed number of possible values, assigning each individual or other unit of observation to a particular group or nominal category on the basis of some qualitative property. Here taste is qualitative property. It would also classify as indicator variable because the indicator variable is indicate absence or presence of some categorical effect that may be expected to shift the outcome.
Indicator variables is dichotomous, quantitative variables, their range of values is small therefore, they can take only two quantitative values.
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would this variable follow the path
categorical -> nominal -> indicator
or
categorical -> nominal
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Based not the utilities-variable option, review the variable from the GSS14SSDS-A. Can you identify three nominal...
Based not the utilities-variable option, review the variable from
the GSS14SSDS-A. Can you identify three nominal variable, three
ordinal variables, and at least on interval-ratio variable? Based
on the information in the dialog box or variable view window, you
should be able to identify the variable name, variable label and
category values.
Figure 1.5 Variable View Window for GSS14SDSS-A Type width Decimals Label ValuesMissing Columns Align Role Nominal 、Input Nominal Input Right Nominal、Input 、Imput Name Measure 1 abany abnomore Numeric...
A) What is the explanatory variable in this study? Is it categorical or quantitative? Number of...
A) What is the explanatory variable in this study? Is it
categorical or quantitative? Number of words memorized,
categorical/Listened to music or not, categorical/Number of words
memorized, quantative/Listened to music or not
B) What is the response variable in this study? Is it
categorical or quantitative? Number of words memorized,
categorical/Listened to music or not, categorical/Number of words
memorized, quantative/Listened to music or not
C) What is the observed statistic in this study?
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D) Assuming a true null hypothesis,...
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Decide (with short explanations) whether the following statements are true or false. e) In a simple linear regression model with explanatory variable x and outcome variable y, we have these summary s...
Decide (with short explanations) whether the following
statements are true or false.
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1. Price: suggested retail price of the used 2005 GM car in excellent condition. 2. Mileage: number of miles the car has been driven 3. Make: manufacturer of the car such as Saturn, Pontiac, and Chevrolet 4. Cruise: indicator variable indicating if the car has cruise control (1 = cruise, 0=no) 5. Type: Style of car (I= convertible, 2 coupe, 3=hatchback, 4= sedan, 5-wagon) 6. Seat: indicator variable representing if the car has leather seats (1 - yes, O- no)...
1. Label the following variables as quantitative or categorical: Make and Model of Vehicle Country: Gas Mileage (in miles per gallon): Political Affiliation: Sex of an infant Type of Rocket: Temperature of water 2. Give a specific example of: Hint: try to think creatively about these! Perhaps use one of the variables from problem 1 and modify slightly if necessary.) a) A categorical variable that can take on exactly 3 values b) A quantitative variable that is at least zero.
Based not the utilities-variable option, review the variable from
the GSS14SSDS-A. Can you identify three nominal variable, three
ordinal variables, and at least on interval-ratio variable? Based
on the information in the dialog box or variable view window, you
should be able to identify the variable name, variable label and
category values.
Figure 1.5 Variable View Window for GSS14SDSS-A Type width Decimals Label ValuesMissing Columns Align Role Nominal 、Input Nominal Input Right Nominal、Input 、Imput Name Measure 1 abany abnomore Numeric...
A) What is the explanatory variable in this study? Is it
categorical or quantitative? Number of words memorized,
categorical/Listened to music or not, categorical/Number of words
memorized, quantative/Listened to music or not
B) What is the response variable in this study? Is it
categorical or quantitative? Number of words memorized,
categorical/Listened to music or not, categorical/Number of words
memorized, quantative/Listened to music or not
C) What is the observed statistic in this study?
2.4/12/2.84/3.62
D) Assuming a true null hypothesis,...
Suppose that the covariates Xj,i for i 1, 2, , n and j 1, 2, , indicator variables for a single categorical variable in the manner covered in the course. Thus, suppose that for each individual i = 1,2,…,n we have that X1.i, X2.i,...,Xd,i this one is equal to the number 1. Let Bk be the (A , . . . , β 1), the minimizer of L (bi , b2, . . . ,勿of eq. (B. = Yn.(k), where...
Decide (with short explanations) whether the following
statements are true or false.
e) In a simple linear regression model with explanatory variable x and outcome variable y, we have these summary statisties z-10, s/-3 sy-5 and у-20. For a new data point with x = 13, it is possible that the predicted value is y = 26. f A standard multiple regression model with continuous predictors and r2, a categorical predictor T with four values, an interaction between a and...
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