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If the coefficient of correlation is 0.8, what is the percentage of variation in the dependent variable explained by the variation in the independent variable.
A random sample of 36 days yielded the average daily output of 890.2 tons, with standard deviation of 19.8 tons. Use this information to make a 95% confidence interval for mean.
Suppose that Total Revenue = 200Q and Total Cost = 80 + 50Q where Q, the quantity sold, is a random variable with expected value 20 and variance 4.
Explain the relationship between total gross and opening gross total gross and number of theatres total gross and week in top 60.
Is there evidence to suggest a difference in the mean waiting times at the four body shops? Use the .05 significance level.
Statistics is science of conducting studies to: Solve a system of equations.
Recognize and describe potential threats (up to 3) to internal validity.
The percentage rates of home ownership for 8 randomly selected states are listed below. Estimate the population variance and standard deviation for the percentage rate of home ownership with 99% confidence level.
Determine the probability that a randomly selected teacher earns more than $525 per week?
What quantitative method can be applied to help the Department make the decision? Outline how this method can be applied and explain how a qualitative method can also be applied to help the Department make the decision
Determine whether the evidence is enough to reject the salesperson's claim. Establish the Null and alternative hypothesis, and choose the right test statistics.
Construct a 90% confidence interval for the population proportion p . Does your result agree with your conclusion in part (a)?
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Estimate the value of the population proportion.
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