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The histograms of some sampling distributions are symmetrical. T-F What would make a histogram symmetrical, and give an example of a symmetrical distribution? A random sample of size 36 is to be selected from a population that has a mean μ = 50 and a standard deviation σ of 10.
Find the standard (z) score for a sample value of 40.
Develop a 99% confidence interval for the population proportion.
Their resting heart rates were measured. A partial ANOVA table is given.
Formulate a suitable null and alternative hypothesis to test the students' claim that they followed their instructor's recommendation at a 5% level of significance and interpret your findings.
Find the regression equation and percentage of variance and test whether the equation is significant portion of the variance.
Use the trend equation to calculate the points for 2003 and 2005. Plot them on the graph and draw the regression line.
If die is loaded so that 6 comes up with probability 0.2 and probabilities of 2,3,4, and 5 faces are not affected, determine the assignment of probabilities to the six faces?
Using given data table, find out midpoint for class with greatest frequency?
Determine the most economical monthly shipping schedule. Provide a table showing the routes and total costs.
Create a scatterlpot of P_RFM and P_HELM. If drawing plot by hand, use graph paper to make sure accuracy. Be sure you label axes. After you have created the scatterplot, consider its form and direction. Recognize outliers, if any.
In a mobile phone shop on a Sunday morning, out of n = 77 customers x = 19 buy a mobile phone. What is the 95% confidence interval for the proportion of customers buying a mobile phone?
If you did not know anything about standard deviation of population from which sample was taken, find out the 95% confidence interval for mean test score.
Calculate the 95% confidence interval for the proportion of students with at least one injury for each of the two subpopulation
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