You ask 40 students which of three items from the cafeteria they like the best. a. pizza: 30% b. pasta: 18 students c. salad: 10 students . 1. what percent of srudents answered salad? 2. how many students answered pizza? 3. what percent of students answered pasta?

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