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Suppose you obtain and read information about new pain medications. A study was conducted to test the side effects of two drugs for the pain medications. TABLE 1 shows the results from the study.
TABLE 1
Side effect
Number of side effects in 12-week clinical trial
Placebo
n = 192
Drug A
n = 186
Drug B
n = 188
Upper respiratory congestion
10
32
19
Sinus headache
11
25
Stomach ache
2
46
12
Neurological headache
34
55
72
Cough
22
18
31
Lower respiratory congestion
5
1
None
111
3
21
a) State whether the study is observational or experimental. Explain your reason.
b) List all the variables.
c) A person is selected at random. Find the probability that the person was
i. receiving a placebo.
ii. receiving drug A or B. Are these events mutually exclusive? Give the reason.
iii. not receiving a placebo or experienced a sinus headache.
iv. having a lower respiratory congestion given that he or she received drug A.
d) Four (4) persons are selected at random for interview session. Two (2) persons from those who received drug A, and the others from those who received drug B. Is it unusual that all of them did not having any side effects? Justify your answer.
Jones Co. currently is 100 percent equity financed. The company is considering changing its capital structure. More specifically, Jones' CFO is considering a recapitalization plan in which the firm would issue long-term debt with a yield of 9 percent..
Assume a bank has $5 million in deposits and $1 million in vault cash. If the bank holds $1 million in excess reserves and the required reserves ratio is 8 percent, what level of deposits are being held?
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