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According to the US Census Bureau, 7.1% of Americans living in 2004 were between the ages of 20 and 24. You take a random sample of 500 Americans and find that 28 of them are between 20 and 24 years old. Has the proportion of Americans aged 20-24 changed from the 2004 proportion?
a) State the null and alternative hypothesis.
Ho: p = _______ Ha: p ¹ ______
b) Calculate the test statistic
c) Determine the P-value
d) At a = 0.10, what is your conclusion? Explain in context of the problem.
computing the expected values for the given probability distribution.find the expected values of the following
Does age make a difference in the amount of savings a worker feels is needed to be secure at retirement? Suppose 210 workers in the 25-33 age category and 176 workers in the 34-52 age category were involved in this study.
Assume a random sample of 16 gasoline stations is selected and their mean cost for regular gasoline is computed. What is the standard error of the mean in this experiment?
Consider the continuous random variable X, which has a uniform distribution over the interval from 20 to 28. The probability that X will take on a value between 21 and 25 is.
imagine you are a manager at a major bottling company. customers have begun to complain that the bottles of the brand
For each data set, compute and save g(m hat). Then do the following: Plot the histogram of B values of g(m hat)and sqrt(n)*[g(m hat)- g(m )].
Problem: Two rainstorms occurred in one week in a certain area. In the first storm 30 ml of rain fell per hour, and in the second storm 20 ml of rain fell per hour.
Find the 95% confidence interval for the mean, of the population from which the sample was drawn. (Round the values to whole numbers for your confidence interval.)
Create interaction plots and What design is this, which factors are fixed and whic random - A datset is provided on a 3 factor factorial on the amount of rot on a potatoe crop.
An order for 5 pizzas has just been place. What is the minimum number of pizzas that must be made in order to be at least 99% sure that there will be 5 that are edible?
Based on these data, what is the probability that next Christmas will be dry and based on the data,what is the probability that next Christmas will be rainy or cloudy and dry?
Find the Probability and prove that the given two events are mutually exclusive and independent or not.
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