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Twenty-five percent of the employees of a large company are minorities. A random sample of 7 employees is selected.
a. What is the probability that the sample contains exactly 4 minorities?b. What is the probability that the sample contains fewer than 2 minorities?c. What is the probability that the sample contains exactly 1 non-minority?d. What is the expected number of minorities in the sample?e. What is the variance of the minorities?
Parameter of interest is mean score in this population. Sample is an SRS of size n = 4 drawn from population. Determine the mean of 10 scores in the population.
The average American male wears a size 10 shoe and spends 4 hours a year tying a tie. The average American female college student owns 3.5 pairs of jeans.
Is the sample a part of the population or the population apart of the sample? Why would researchers just not use the entire population to be more accurate? Can you give an example of a sample from a given population?
Draw a scatter diagram of the following bivariate data.
Results of study are summarized below. Use a 5% level of significance and test claim that opinion is independent of brand.
A manager of a gasoline filling station is thinking about a promotion that she hopes will bring in more business to the full-service island. She is considering the option that when a customer requests a fill-up
What is the probability that a randomly selected monthly cell phone bill is more than $100?
This distribution is positively skewed. The standard deviation of the population is not known.
You attempt a 50 item (n = 50) true-and-false exam. You did not study for the material and your attempt to answer any item is a guess, with a 50% chance that you will get any item correct. You need a score of 30 or better to pass the exam.
Use simple exponential smoothing with α = 0.33 to forecast battery sales for February through May. Assume that the forecast for January was for 22 set of tires.
What is the likelihood the sample mean is greater than $22.50 but less than $25.00?
A cereal manufacturer wants to determine if the filling machine is operating to specifications. The machine is specified to fill to a 12oz level.
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