A pizza place has six drivers to deliver their pizzas. The average mileage for each car is between 21 and 23 miles per gallon. Each driver travels between 86 miles and 96 miles a day. The pizza shop estimates that they will need about 17 gallons of fuel a day for all the vehicles. Is this a reasonable estimate?

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Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

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