The following 7 observations are a random sample from a normal population. (5 marks) Obtain a 98% con dence interval of the population mean.

The following 7 observations are a random sample from a normal population.7.4 7.1 6.5 7.5 7.6 6.3 6.9a. (5 marks) Obtain a 98% condence interval of the population mean.b. At 1% level of signicance, do the data support the claim that the population mean is less than 7.5?

Question:The following 7 observations are a random sample from a normal population.7.4 7.1 6.5 7.5 7.6 6.3 6.9a. (5 marks) Obtain a 98% confidence interval of the population mean.b. At 1% level...