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A small manufacturing firm has 250 employees. Fifty have been employed for less than 5 years and 125 have been with the company for over 10 years. Suppose that one employee is selected at random from a list of the employees. For the following events, compute the probabilities requested below. A = the event the selected employee has been with the firm less than 5 years B = the event the selected employee has been with the firm years. C = the event the selected employee has been with the firm over 10 years. a) P(A) b) P(C) c) P(A or B) d) P(A and C)
Equation of the regression line - Evaluate the equation of the regression line and Find y' when x=47 years.
The assumption of independent error terms in regression analysis is often violated when using time series data and is called the problem of Autocorrelation.
Suppose you used a .01 level of significance. Would that change your decision in terms of the problem in part a? Explain why or why not.
the amount of unused sick time for individual employees is uniformly distributed between 0 and 480 minutes. Based on this information, what is the probability that an employee will have less than 20 minutes of unused sick time?
Airplaneflight during the last year. If we take a random sample of 40 adults, the probability is 0.37 that the sample proportion is greater than what number.
In a sample of 10 workers, what is the probability that exactly three workers take the public transport daily? [Hint: It is a Binomial Distribution Problem.]
Assume that causes of heart failure between individuals are independent. What is the probability that three individuals have conditions caused by outside factors?
A recent survey of frozen convenience meals found a correlation of r=0.768 between calories and fat content in the sampled meals.
A certain state lottery awards 418 prizes; 28-$200 prizes, 120-$25 prizes and 270-$20 prizes, for every 10,000 tickets sold.
An expert witness in a case of alleged racial discrimination in a state university school of nursing introduced a regression of the determinants of Salary of each professor for each year during an 8-year period (n = 423) with the following results, w..
Test the null hypothesis that these Arizona students scored the same as the North Dakota students. (238 North Dakota students had a mean of 525)What t-statistic do you obtain?
Based on the numbers presented, what do you think of the discrimination claim?
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