A U.S labor report says the months unemployment rate is 7%. Ten random employable people are selectd by your marketing team for an interview about your product. Let Y be the number in the group who are unemployed.  a) What specific type of random variable is Y b) Find the expected number who are unemployed c) Find the probability that at least two people in the group are unemployed.

An HP laser printer is advertised to print text documents at a speed of 18 ppm (pages per minute). The manufacturer tells you that the printing speed is actually a Normal random variable with a mean of 17.57 ppm and a standard deviation of 3 ppm. Suppose that you draw a random sample of 11 printers. Part i) Suppose the number of printers drawn is quadrupled. How will the standard deviation of sample mean printing speed change? O A. It will decrease by a factor of 4. OB. It will increase by a factor of 4. O C. It will increase by a factor of 2. O D. It will decrease by a factor of 2. OE. It will remain unchanged. Part ii) Suppose the number of printers drawn is quadrupled. How will the mean of the sample mean printing speed change? O A. It will decrease by a factor of 2. O B. It will decrease by a factor of 4 O C. It will increase by a factor of 4. O D. It will increase by a factor of 2. OE. It will remain unchanged. Part iii) Consider the statement: 'The distribution of the mean…

Use the following results from a test for marijuana use. Among 144 subjects with positive test​ results, there are 21 false positive results. Among 139 negative test​ results, there are 4 false negative results. a. How many subjects are included in the​ study? b. How many of the subjects had a true negative​ result? c. What is the probability that a randomly selected test subject had a true negative​ result?

According to a health​ publication, 16.5​% of persons under the age of 65 have no health insurance coverage. Suppose that four persons under the age of 65 are randomly selected. a. Determine the probability distribution for the​ number, X, who have no health insurance coverage. b. Determine and interpret the mean of X.