Assume that we want to construct a confidence interval. do one of the? following, as? appropriate: (a) find the critical value t subscript alpha divided by 2? , ? (b) find the critical value z subscript alpha divided by 2? , or? (c) state that neither the normal distribution nor the t distribution applies. here are summary statistics for randomly selected weights of newborn? girls: n=193? , (x w/overbar) =30.8 ? hg, s=7.6 hg. the confidence level is 95? %.
ta/2=
za/2=
or
neither the normal distribution nor the t distribution applies.

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. another supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which would you choose and how much would you save with that choice? show calculator try it! if you buy 1000 ml bags, how many do you need to buy each month? type your answer in the space provided and click on the check answer button.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling