Need answer with steps on question 2 please

seconds)". A simple random sample of 40 current hit songs results in a mean length of 252.5 seconds. Assume that the standard deviation of all such song lengths is 54.5 sec. Use a 0.05 significance level to test the claim that the sample is from a population of songs with a mean greater than 210 seconds. 2. A simple random sample of FICO scores is listed below. The mean FICO score is reported to be 678. Assuming that the standard deviation of all FICO scores is known to be 58.3, use a 0.01 significance level to test the claim that these sample FICO scores come from a population with a mean equal to 678. DATA: 714, 751, 664, 789, 818 , 779, 698, 836, 753, 834, 693, 802. 3. The mean weight (Ibs) of discarded plastic from a sample of 62 households is 1.911 lbs. The population (ALL such households) standard deviation is 1.065 Ibs. Test, at = 0.04, the claim that the mean weight of discarded plastic from the population of households is greater than 1.8 lbs. 4. Researchers collected a simple random sample of the times that 81 college students were required to earn their bachelor's degrees. The sample has a