You intend to conduct a test of homogeneity for a contingency table with 4 categories in the column variable and 3 categories in the row variable. You collect data from 295 subjects. What are the degrees of freedom for the χ2 distribution for this test? d.f. =

A chi-square homogeneity test is to be conducted to decide whether a difference exists among the distributions of a variable of seven populations. The variable has four possible values. What is the degrees of freedom for the x²-statistic? The degrees of freedom is (Simplify your answer.)

The difference between the largest and the smallest data values is the O variance O interquartile range O range O coefficient of variation

A study was conducted to see of airbags save lives. The table below lists the results from a simple random sample of front-seat occupants involved in car crashes.    Airbag Available No Airbag Available Occupant Fatalities 41 52 Total number of occupants 11,541 9,853   What is the sample proportion of fatalities where there were no airbags available, p2? What is the difference in the two proportions, D? What is the standard error of the difference, SED?