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1. Find the unemployment rates. Find the unemployment rate for people with each level of education. How does the unemployment rate change with education? Explain carefully why your results show that level of education and being employed are not independent.
2. Conditional probabilities and independence.
(a) What is the probability that a randomly chosen person 25 years of age or older is in the labor force?
(b) If you know that the person chosen is a college graduate, what is the conditional probability that he or she is in the labor force?
(c) Are the events "in the labor force" and "college graduate" independent? How do you know?
3. Find some conditional probabilities. You know that a person is employed. What is the conditional probability that he or she is a college graduate? You know that a second person is a college gradauate. What is the conditional probability that he or she is employed?
A random sample of size 16 is chosen from a population and a 90% confidence interval for the standard deviation will be determined. What value of should be located in the chi-square distribution table?
A manufacturer wants to increase the shelf life of a line of cake mixes. past records indicate that the average shelf life of the mix is 216 days. after a revised mix has been developed, a sample of nine boxes of cake mix gave these shelf lives (i..
A medical researcher is interested in whether patient's left arms or right arms are longer. if 14 patients participate in this study (so that n left arms and n right arms are measured), how many degrees of freedom should the researcher use in her ..
in a human factor experimental project it has been determined that the reaction time of a pilot to a visual stimulus is
The mean weight of newborn babies in a Long Island Community is 7.5 lbs with a standard deviation of 1.4 lbs. What is the probability that a random sample of 49 babies has a sample mean weight of at least 7.2lbs?
Body mass index is measures at the ratio of weight in kilograms to height in meters squared. Generate a 95% confidence interval estimate of the true BMI. 25 27 31 33 26 28 38 41 24 32 35 40.
For all questions, clearly explain/show your answers. For the Analysis section, justify your answers with the appropriate graphs, statistics, equations, etc.
The personnel manager at a company wants to investigate job satisfaction among the female employees. One evening after a meeting, she talks to all 30 female employees who attended the meeting.
Calculate a sample mean and standard deviation and then reject shipment if the sample average falls below some agree-upon value.
Conduct a hypothesis test using the .04 level of significance to determine if there is a difference between the population means.
what is a measure of dispersion of random variable values about the expected
if x1 and x2 are independent random variables x1 has a chi-square distribution with 3 degrees of freedom and x1 x2 has
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