1. The average cost for teeth straightening with metal braces is approximately $5400. A nationwide franchise thinks that its cost is below that figure. A random sample of 28 patients across the country had an average cost of $5250 with standard deviation of $629. At or = 0.025, can it be concluded that the mean is less than $5400? Step 1: State hypotheses by filling in the symbol (=, , or not equal) and the population mean: Ho: p (Blank 1) (Blank 2) H1: p (Blank 3) (Blank 4) Step 2: Find the critical value (from the table) (example: 2.34 or -2.34 or +i 2.34: Critical tvalue is: (Blank 5) Step 3: Compute the test value using the formula (round to two decimal places, example 6.45): T test value is: (Blank 6)