need help with this

14. A researcher claimed that for people that smoke cigarettes, the average number of cigarettes smoked per day is greater than 9. To test her claim, she selected a random sample of 35 smokers and found the mean number of cigarettes smoked per day was 10. The standard deviation ofthe population is 25 cigarettes. At .' = 0.05, conduct all steps of a hypothesis test to test the resea rcher's claim