Need answer with steps for number 5

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. Use a 0.01 significance level to test the claim that the sample is from a population with a mean less than 1000 hic. Do the results suggest that all of the child booster seats meet the specified requirement? DATA: 774, 649, 1210, 546, 431, 612 6. A recently televised broadcast of 60 minutes had a 15 share, meaning that among 5000 monitored households with TV sets in use, 15% of them were tuned to 60 minutes. Use a 0.05 significance level to test the claim of an advertiser that among the household with TV sets in use, less than 20% were tuned to 60 minutes. 7. In a poll of 745 randomly selected adults, 591 said that it is morally wrong to not report all income on tax returns. Use a 0.01 significance level to test the 75%