Check Your Progress an arena, steel bars with a mean ultimate tensile strength of In building 400 Megapascal (MPa) with a variance of 81 MPa were delivered by the manufacturer. The project engineer tested 50 steel bars and found out that the mean ultimate tensile strength is 390 MPa. The decision for the extension of the contract with the manufacturer the engineer. Test the hypothesis whether or not there is no significant depends difference between the two means using a two-tailed test with a = 0.01. 1. What are the appropriate hypotheses for the two-tailed test? 2. What is the test statistic to be used and the reasons for its selection? 3. What is the critical value c? What is the value of the test statistic or the computed value? 5 Formulate a conclusion about the given situation. onie

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Average

In mathematics, everyone must have heard the term average in one place or other. Almost all types of calculation require taking out an average. In everyday life, the term is used for denoting a certain amount that can be said to be a typical quantity for multiple people or objects. In other words, if a group of people possesses a certain object, then the average gives us an idea regarding the quantity of the object possessed by each person. However, this is solely based on mathematical calculation. It is important to note that most people will not strictly have the average value in a group.