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The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds.
a) What is the value of the population mean? What is the best estimate of this value?
b) Explain why we need to use the t distribution. What assumption do you need to make?
c) For a 90 percent confidence interval, what is the value of t?
d) Develop the 90 percent confidence interval for the population mean.
e) Would it be reasonable to conclude that the population mean is 63 pounds?
A company wants to know if minorities are more likely to be in certain job categories than others. Their data base codes employees 1 for clerical, 2 for custodial, and 3 for manager. A logistic equation was fit to the data with SPSS.
Explain how much money do these people make each year. Suppose you read in your local newspaper that 45 officials in student services whioch is earned as an average.
Below is a plot of the Olympic gold medal winning performance in the high jump (in inches) for the years 1900 to 1996.
More than 13 successes in 19 trials with a 40 percent chance of success. (Round the answer to 4 decimal places.) Fewer than 7 successes in 15 trials with a 40 percent chance of success. (Round the answer to 4 decimal places.)
Given the same significance level, a ________ value of t will be required to reject the null hypothesis compared to the value of z required for rejection.
Based on the scatter diagram, does there appear to be any relationship between the number of assemblers and production? Explain.
Professor Cox needs a volunteer amongst 30 students in his statistical applications course. The average age of his students is 25 years, with the standard deviation of 3 years.
Compute the probability that debt for a randomly selected borrower with good credit is more than $18,000?
Data on distribution of cost for building effort, design work and testing effort.
Conduct the hypothesis test and compute the p-value. At a 0.05 level of significance, what is your conclusion?
Find out the forecast value utilizing three month moving average method, weighted moving average method, exponential smoothing and regression methods.
Determine marginal probability distributions of X and Y . Compute conditional probability P ( Y = 2 | X = 1)
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