If a study suffers from confounding, what is true? The variable of interest is not known.

The researchers are confused by the experiment.

The effects of different variables are mixed, so the researcher cannot determine the effects of the variable of interest.

The variable of interest has no effect on the experiment at all.

What is the frequency of the sinusoidal graph?

The mean finish time was 185.52 with a standard deviation of 0.327 minute. the winning car driven by chris finished in 185.13. the previous year race had a mean finish time of 110.3 with a standard deviation of 0.106. the winning car that year driven by karen finished in 110.13 minutes. find their respective z-scores. chris - z-score karen “- z-score

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.