I need the answer with explanation please

1-

i)The dean of a major university claims that the mean time for students to earn a Masters degree is at most 3.4 years. State this claim mathematically. Write the null and alternative hypotheses. Identify which hypothesis is the claim.

ii)A fast food outlet claims that the mean waiting time in line is less than 3.4 minutes. A random sample of 60 customers has a mean of 3.3 minutes with a population standard deviation of 0.6 minute. If = 0.05, test the fast food outlets claim by P-value approach.

2-

Listed below is the number of tickets issued by a local police department. Assuming that the data is normally distributed, test the claim that the standard deviation for the data is 15 tickets. Use = 0.01.

7048 41 68 6955 70

57 6083 32 60 72 58