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[answered] A)Degrees of freedom for the chi-square test of independenc


A)Degrees of freedom for the chi-square test of independence is determined by??

1)subtracting 2 from the number of cells there are (k ? 2).

2)subtracting 1 from the number of cells there are (k ? 1).

3)multiplying the number of rows minus 1 times the number of columns minus 1.

4)subtracting 1 from the number of participants that there are (N ? 1).


B)To use a nonparametric test, it is appropriate to transform the data from scale to:?

1)?nominal.

2)ordinal.

3)the square root of the scale values.

4)the square root of the ratio values.


C)You find a Spearman correlation coefficient of ?0.58 between cleanliness ranking (high rank = very clean) and risk of infection ranking (high rank = high risk) from the SENIC data set. What can you conclude from these findings?

There is a fairly strong negative correlation between risk of infection and cleanliness rank, because patients were more likely to get an infection at hospitals with a low cleanliness ranking.

There is a fairly strong positive correlation between risk of infection and cleanliness rank, because as the rank for cleanliness increased, so did a patient's risk of infection.

There is no correlation between cleanliness of hospitals and risk of patient infection.

Unsanitary conditions at hospitals cause more infections in patients.

 


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