1. If, in a sample of n=30 selected from a normal population, X overbar=58 and S=8, what are the critical values of t if the level of significance α is 0.10, the null hypothesis Ho is µ=50, and the alternate hypothesis, H1, is µ doesn’t equal 50. The critical values of t are? +/-_____. (Round to 2 decimal places) 2. In a random sample of 400 items, 7 are defective. If the null hypothesis is that 11% of the items in the population are defective, what is the value of Zstat? (Round to 4 decimal places) 3. In a one-tail hypothesis test where you reject H0 only in the upper tail, what is the p value if zstat= + 1.90? 4. What is the p-value if, in a two-tail hypothesis test Zstat=-1.69? (INFO ATTACHED) ***please use excel for calculations/functions***