If they use a Wald chi square test to assess whether age (entered as a continuous variable in the model )was significant. how many degrees of freedom with the Chi square sampling distribution of that test statistic have?

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If they use a Wald chi square test to assess whether age (entered as a continuous variable in the model )was significant. how many degrees of freedom with the Chi square sampling distribution of that test statistic have?
In running a logistic regression, a statistician decided to include decade of life (20s, 30s, 40s, 50s, 60s) as a categorical variable in the systematic component
because they didn't believe the relationship between the log-odds and age was linear. Using dummy variables to create the systematic component, how many
dummy variables would be needed to represented age?
Transcribed Image Text:In running a logistic regression, a statistician decided to include decade of life (20s, 30s, 40s, 50s, 60s) as a categorical variable in the systematic component because they didn't believe the relationship between the log-odds and age was linear. Using dummy variables to create the systematic component, how many dummy variables would be needed to represented age?
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