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The human resources department of a very large organisation is trying to determine the proportion of all employees that are satisfied with their current position. They randomly select 144 employees and ask them: "Are you satisfied with your current position?" 68 replied yes they were. Construct a 95% confidence interval to estimate the true proportion of all employees at this workplace who were satisfied with their position.
A 95% confidence interval for the true proportion of all employees at this workplace who were satisfied with their position is between (round your answers to 2 dp)
Suppose a certain type of pesticide actually is toxic to humans, but a study erroneously concludes that it is not toxic, and the pesticide is kept in use.
"You are running a chi-squared test. If you have 5 groups with 3 characteristics each, what would your critical value be with an alpha of .25? a . Between 0 and 3.0
Two pairs is a poker hand containing 2 cards of one denomination, another 2 cards of a second denomination, and a fifth cards of a third dimension. Find the probability of a player being dealt two pairs.
consider the number of subsets of a set with nelements. use the fact that there are cnk subsets of k elements with
Use the empirical rule to estimate the number of farms whose land and building values per acre are between $1100 and $1700.
What is the relationship between exam anxiety and exam performance for students? What is the relationship between gender and exam performance for students?
When determining the sample size necessary for estimating the true population mean, which factor is not considered when sampling with replacement?
Can Mr. Rutter conclude that the mean weight of the bags is less than 50 pounds? Use the 0.1 significance level. In a brief report, tell why Mr. Rutter can use the z distribution as the test statistic.
who would be more likely to give an incorrect response about whether smoking was permitted at their workplace-smokers or nonsmokers?
For a sample of n participants, the relative frequencies are f0/n = .2, f1/n = .4, f2/n = .2, f3/n = .15, and f4/n = .05. The sample mean is 1.45.
A group of 60 second graders is to be randomly assigned to two classes of 30 each. (The random assignment is ordered by the school district to ensure against.
Recent crime reports indicate that 4.2 motor vehicle thefts occur each minute in the United States. Assume that the distribution of thefts per minute can be approximated by the Poisson probability distribution.
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