The time spent (in days) waiting for a heart transplant in two states for patien

Question

The time spent (in days) waiting for a heart transplant in two states for patients with type A blood can be approximated by a normal distribution, as shown in the graph to the right. Complete parts (a) and (b) below. 122 -19.9 Click to view page 1 of the table. Click to view page 2 of the table. 50 195 (a) What is the shortest time spent waiting for a heart that would still place a patient in the top 15% of waiting times? days (Round to two decimal places as needed.) (b) What is the longest time spent waiting for a heart that would still place a patient in the bottom 20% of waiting times? days (Round to two decimal places as needed.) Enter your answer in each of the answer boxes.

Explanation / Answer

a)

for top 15% ; zscore =1.0364

therefore corresponding value =mean +z*std deviation =142.63 ( please try 142.70 if this does not wrk due to rounding)

b)

for bottom 20% ; zscore =-0.8416

therefore corresponding value =mean +z*std deviation =105.25 ( please try 105.28 if this does not wrk due to rounding)

for normal distribution z score =(X-)/ here mean=       = 122 std deviation   == 19.9000

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