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"A company of accountants has branches in five regions, Port Louis (PL), Curepipe (CPE), Beau Bassin (BB), Rose Hill (RH) and Quatre Bornes (QB). It employs the following number of staff at each branch - 120 at PL, 80 at CPE, 40 at BB, 60 at RH, 100 at QB.
Suppose the company wishes either to involve every employee, or conduct a survey of 20% of its employees. Advise how the sample for surveying should be best selected by each of the following sampling methods, commenting on the advantages of each:
a. Census. b. Cluster sampling.c. Simple random sample.d. Stratified random sample. e. Systematic sample.
In a quaternaryphase shift keying (QPSK) communications system, one of four equally probable symbols s0,...,s3 is transmitted in T seconds. If symbol si is sent, a waveform x(t,si)
The screening test for the hep-c virus works by detecting the presence of antibodies to the virus. However, some non-HCV proteins can trigger a false positive, at a probability of
Just interested how indepth are the answers
1. Compute the z scores for the following raw scores where = 78 and the standard deviation = 4. a. 72 b. 82 c. 78 d. 87 e. 71
what is meant by time series?
If 9 population means are not all equal with a conclusion from ANOVA, we should expect that?
What would be the cutoff score to indicate a score that is in the top 15% of the scores on a test with a mean of 100 and a standard deviation of 15?
A cognitive psychologists knows that concrete words, which easily evoke images (.e.g. "sunset", "truck") are easier to remember than abstract words, but she would like to know if t
find a distribution with 10 values between 0 and 10 that has as large a variance as possible
meaning
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