A random sample of 157 automobiles in the USA completed in 2020 found that the mean age of automobiles was 5.7 years with sample standard deviation 7.25 years. Use this data to test the claim that the population mean age of automobiles is 6.85 years. Use a confidence level of 95%. The histogram of the 157 automobile ages was skewed to the right suggesting a skewed to the right population The null hypothesis and alternative hypotheses were: H0 : = 6.85 years (in other words, the population mean age of automobiles in the USA is 6.85 years) H1 : 6.85 years (in other words, the population mean age of automobiles in the USA is not 6.85 years) The results of our hypothesis test was to reject the null hypothesis in favor of the alternative hypothesis. The value of is The value of /2 is The degree of freedom is The value of xbar - E is years (round to two decimal places) The value of xbar + E is years (round to two decimal places) The value of the average age of US automobiles as given by the null hypothesis is 6.85 years. Is 6.85 years