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A psychologist has to develop a new test of spatial perception, and she wants to estimate the mean score achieved by male pilots. How many people must she test if she wants the sample mean to be in error by no more than 2.0 points, with 95% confidence? An earlier study suggests that σ = 21.2.
Florida State University administers a mathematics placement test to students where they 1st enter the university.
You run a two tail t-test. The critical value for this test at the .05 level is a t of 7.82. What value must the obtained t-test statistic be in order to be considered significant at the .05 level?
One-way Analysis of Variance (ANOVA) test - How many treatments are there and What is the total sample size?
There are 500 employees in a firm, 45% are female. A sample of 60 employees is selected randomly. (a) Determine the standard error of the proportion.
Provide an example of a situation in which factor analysis, cluster analysis, and multidimensional analysis might be used.
Depends on the satellite information illustrate what is the expected number µ of real forest fires on the Seward Peninsula.
Determine the probability of fatal accident over lifetime? Describe your reasoning carefully. Suppose independent events. Why might the supposition of independence be violated?
You may assume the sample data comes from a population that follows a normal distribution.
Give an example of a hypothesis test. State what the Null and the Alternative hypotheses.
Calculate the correlation coefficient and prediction equation.
Find the average age at which people will experience their first cardiac incident, given that 17% of all initial cardiac incident victims are younger than 50. Please, interpret the result.
At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. If you determine not to reject the null hypothesi..
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