5. A random sample of 450 Californians was found to have a mean credit score of 692, with a standard deviation of 48.7. a) Would this scenario allow for the estimation of or ? Describe the parameter in words. b) Construct a 94% confidence interval for the parameter you picked in part (a). c) Interpret the interval you made in part (b) d) Is it plausible that 700 would be the true mean credit score for all Californians? Why or why not