Seatwork Week 4
Deadline of submission on or before March 22, 2022. Send your answer to our Group Chat
A. Do the indicated tasked
1. Explain why the proportion of the area under the normal curve to the left of z = -2.58 is .1%
2. Explain why the total area of the region between z=-3 and z=3 is 99.74%
B. Draw a Sketch of the curves and shade the regions in the tasks in A
Seatwork Week 5
Deadline of submission on or before March 25, 2022. Send your answer to our Group Chat
a. Complete the table. Show complete solution
x z µ σ
1 90 82 6
2 -1.3 75 10
3 78 -2 84
4 1 69 3
5 70 5 12
b. Where does the 50th percentile lie under the normal curve?
c. Suppose there are 10,000 test takers of the IQ test where the mean is 100 & SD is 16. What are the raw scores
that correspond to each of the following z-score?
1. Z = 1
2. Z=2
3. Z=3
4. Z=-1
5. Z=-2
6. Z=3
d. Suppose there are 10,000 test takers of the IQ test where the mean is 100 & SD is 16. How many scores are
there above 84?
