The mean cost of a five pound bag of shrimp is 40 dollars with a standard deviation of 8 dollars. If a sample of 51 bags of shrimp is randomly selected, what is the probability that the sample mean would be less than 42.7 dollars?

The fraction of defective integrated circuits produced in a photolithography process is being studied. a random sample of 300 circuits is tested, revealing 17 defectives. (a) calculate a 95% two-sided confidence interval on the fraction of defective circuits produced by this particular tool. round the answers to 4 decimal places. less-than-or-equal-to p less-than-or-equal-to (b) calculate a 95% upper confidence bound on the fraction of defective circuits. round the answer to 4 decimal places. p less-than-or-equal-to

Pls never taught i’m really confused and i rlly need

Select the correct answer and solve for y