Need answer to question 4 with steps

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 Ibs. 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 mean of 4.8 years and a standard deviation of 2.2 years. Use a 0.05 significance level to test the claim that the mean time for all college students is greater than 4.5 years. 5. The National Highways Traffic Safety Administration conducted crash tests of child booster seats for cars. Listed below are results from those tests, with the measurements given in hic (standard head injury condition units). The safety requirement is that the hic measurement should be less than 1000 hic