A researcher wishes to estimate the proportion of people within a certain population who are HIV positive. Obtain a sample size that will ensure a margin of error of at most 4.8 percentage points for a 95 confidence interval.
Assume that it is reasonable to presume that the percentage of those sampled who are HIV positive will be between 3 and 7.
A) 49 B) 417 C) 109 D) 117
Question 2
The probability that a radish seed will germinate is 0.7. A gardener plants seeds in batches of 13. Find the standard deviation for the random variable X, the number of seeds germinating in each batch.
A) 1.587 B) 1.632 C) 1.652 D) 1.568
Genetic drift and population size.
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