Alocal ice cream store is analyzing the day's sales. each serving came in either a cup or cone, but not both, and the ratio of servings to cups was 7: 4. what was the ratio of serving to cones?
a) 4: 7
b) 3: 4
c) 7: 3
d) 11: 4

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