Complete the frequency table: method of travel to school walk/bike bus car row totals under age 15 18 165 age 15 and above 65 195 column totals 152 110 98 360 what percentage of students age 15 and above travel to school by bus? round to the nearest whole percent. 36% 26% 45% 50%

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables