the tensil strength of spot welds produced by a robot welder is approximately normally distributed, with a mean of 10,000 pounds per inch and a standard deviation of 800 pounds per inch. For a simple random samply of forty welds determine:   the probability that the sample mean will be at least 10,200 pounds per square inch the probability that the sample mean will be less than 9,900 pounds per square inch the probability that the sample mean will be between 9,700 pounds per square inch and 10,300 pounds per square inch

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.