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Construct a 96% confidence interval for the population proportion when 285 people out of 750 were in favour of boycotting the World Cup matches if prices were to rise above $100 for 64 televised matches. Show your answer in percentage form, rounded to 2 decimal places.
Set up the appropriate null and alternative hypothesis for testing whether the original sample overestimated the average executive director annual salary.
The number of smokers among 120 randomly selected students will vary from group to group. Explain why that number can be described wit a normal model.
If the server has 40 customers in one shift, what is the probability that her total tips are less than $250? (Assume that these 40 customers represent a simple random sample).
Define irregular component in time series and explain the differences between other components as well as its effects.
A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were:
Generate the statistical null and alternative hypotheses. Describe what information the effect size would tell you that the probability value would not tell you.
In an evaluation of the medical lab, the manager is interested in the efficiency of three technicians when they process four routine blood tests.
Suppose that the incident rate of a particulat kind of accient is 1/10,000 persons. In a town of 50,000 persons, what is the probability that there is no accident of this kind?
Determine the critical value. Using the critical value rejection rule, what is the statistical conclusion?
Using Coefficient of Variation determine in which year do the ages show a more dispersed distribution? Show your complete work and support your answer.
Does it seem prevention plans were effective in reducing mean amount of a claim? Use 0.05 level of significance. Set up Null and Alternate Hypothesis.
What is the probability that the contaminated can is selected for testing?
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