In march 2015, the public policy institute of california (ppic) surveyed 7525 likely voters living in california. this is the 148th ppic research poll, and is part of a survey series that started in 1998. ppic researchers find that 3266 survey participants are registered democrats and 2137 survey participants are registered republicans. ppic is interested in the difference in approval rate for the governor between registered democrats and registered republicans in california. participants were asked: "overall, do you approve or disapprove of the way the governor of california is handling his job? " 2450 of the registered democrats answered "yes" and 684 of the registered republicans answered "yes." true or false? a normal model is an appropriate fit for the sampling distribution of sample differences.

Felix wrote several equations and determined that only one of the equations has no solution. which of these equations has no solution?

Which diagram best shows how fraction bars can be used to evaluate 1/2 divided by 1/4?

Atechnician compares repair costs for two types of microwave ovens (type i and type ii). he believes that the repair cost for type i ovens is greater than the repair cost for type ii ovens. a sample of 6767 type i ovens has a mean repair cost of $79.79$⁢79.79. the population standard deviation for the repair of type i ovens is known to be $19.18$⁢19.18. a sample of 5555 type ii ovens has a mean repair cost of $75.24$⁢75.24. the population standard deviation for the repair of type ii ovens is known to be $21.40$⁢21.40. conduct a hypothesis test of the technician's claim at the 0.050.05 level of significance. let μ1μ1 be the true mean repair cost for type i ovens and μ2μ2 be the true mean repair cost for type ii ovens. step 2 of 4 : compute the value of the test statistic. round your answer to two decimal places.