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A biologist wishes to estimate the effect of an antibiotic on the growth of a particular bacterium by examining the mean amount of bacteria present per plate of culture when a fixed amount of the antibiotic is applied. Previous experimentation with the antibiotic on this type of bacteria indicates that the standard deviation of the amount of bacteria present is approximately 13 cm2. Use this information to determine the number of observations (cultures that must be developed and then tested) to estimate the mean amount of bacteria present, using a 99% confidence interval with a half-width of 3 cm2.
Profitability at a bank is declining as customers are shifting to other banks. As a researcher, identify the problem (root cause of the symptom) through a scientifically crafted research proposal.
suppose that you want to estimate the mean ph of rainfalls in an area that suffers from heavy pollution due to the
Suppose the budget has the support of 52% of the voters. What is the probability that the newspaper's sample will lead it to predict defeat?
it is known that 62 of households in a neighborhood have cable tv. a sample of 8 houses was selected at random.
the local newspaper was interested in the proportion of people that would vote in favor of a bond issue to add a new
1. in the united states the average weight of an adult male is 172 pounds with a standard deviation of 29 pounds.
Determine the value of the finite population correction factor if population size is 1000 and the sample size is 300? What is the smallest sample size for which finite population correction factor must be Used?
we rolled two six-sided dice one with sides 1 2 2 3 3 4 and the other with sides 1 3 4 5 6 8. what is the distribution
Suppose that 55 percent of the people in a population of 500,000 support your candidate. If you conduct a poll of 1,000 people, what is the interval that has a 95 percent chance of containing the results of your poll?
find the indicated iq score. the graph to the right depicts iq score of adults and those scores are normally
let z be a standard normal random variable. use the calculator provided to determine the value of c such thatp z less
Find the expected number of passengers who wait for 1 unit of time or less and find P
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