Arandom sample of 500 registered voters in phoenix is asked if they favor the use of oxygenated fuels year-round to reduce air pollution. if more than 314 voters respond positively, we will conclude that at least 60% of the voters favor the use of these fuels. round your answers to four decimal places (e. g. 98.7654).

a) find the probability of type i error if exactly 60% of the voters favor the use of these fuelsb) what is the type ii error probability (beta) β if 75% of the voters favor this action?

What is the value of x when x + 7 = 21?

It appears that people who are mildly obese are less active than leaner people. one study looked at the average number of minutes per day that people spend standing or walking. among mildly obese people, the mean number of minutes of daily activity (standing or walking) is approximately normally distributed with mean 376 minutes and standard deviation 64 minutes. the mean number of minutes of daily activity for lean people is approximately normally distributed with mean 528 minutes and standard deviation 107 minutes. a researcher records the minutes of activity for an srs of 7 mildly obese people and an srs of 7 lean people. use z-scores rounded to two decimal places to answer the following: what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 mildly obese people exceeds 420 minutes? what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 lean people exceeds 420 minutes?

Which of the following parabolas opens down?