1. In the Journal of the American Dietetic Association, it was reported that 54% of kids said that they had a snack after school. A random sample of 60 kids was selected, and 34 said that they had a snack after school. Use α = 0.01 to test the claim.
2. According to the American Pet Products Manufacturers Association, cat owners spend an average of $179 annually in routine veterinary visits. A random sample of local cat owners revealed that 10 randomly selected owners spent an average of $205 with s = $26. Is there a significant statistical difference at α = 0.01? Assume the population is normally distributed.
3. The mean salary of federal government employees on the General Schedule is $59,593. The average salary of 30 state employees who do similar work is 558,800 with σ = $1500. The sample data is normally distributed. At the 0.01 level of significance, can it be concluded that state employees earn on average less than federal employees?