Which of the following statements about z-scores is true?

The length of pregnancies of elephants is normally distributed, and has a mean of 525 days (1.4 years) and standard deviation of 33 days. What is the 95th percentile of elephant pregnancies? (Round to the nearest whole number).

The distribution of the Iowa Test of Basic Skills (ITBS) vocabulary scores for 7th-grade students in Gary, Indiana is normal with a mean of 12 and a standard deviation of 3. Using the empirical rule (68-95-99.7), approximately what percent of ITBS scores are between 9 and 15?

In healthy children age 5 to 15 years, the left atrial (upper) chamber of the heart has a diameter which is approximately normally distributed with a mean of 26.4 mm and standard deviation of 4.2 mm. Carlos is 10 years old, and his left atrial chamber has a diameter with a z-score of 2.00.  What does this mean in context?

A client with a history of several episodes of acute glomerulonephritis over the past several years,  presents to the ED with new complaints of nocturia, intermittent periods of heavy nose bleeds and weight loss.  Current lab work reports elevated BUN and creatinine levels.  What assessment findings does the nurse anticipate? 

A nurse is assessing a client with decompensated cirrhosis.  What assessment findings woudl the nurse expect to observe?  Select all that apply.

Determine whether the following series converge or diverge. For each of these series: Clearly indicate the test you are using to reach your conclusion and Make sure you show all steps required to apply the respective test.

Consider the feasible region defined as the solution set to the following system: 2x + 4y ≤ 8x, y ≥ 0 Two of the corners to this region are (0,0)(0, 0) and (4,0)(4, 0).  What is the third corner?  Enter only a single number (no spaces) in each box. The third corner is (, ).

Maximize z=12x-3yz = 12x – 3y Subject to: 2x + 4y ≤ 8x, y ≥ 0

5. Determine the location of the center of pressure (yp), measured from the free water level.