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1. A town has 100,000 families; 0.1 of 1% of these families have incomes over $200,000 a year. The number of such families is.
2. There are 100 million eligible voters in the United States. The Gallup poll interviews 5,000 of them. This amounts to 1 eligible voter out of every.
3. In the United States, one person out of every 200 is in the army, and 8 of every 10,000 are army officers. What percentage of army personnel are officers, or can this be determined from the information given?
4. In the US, one person out of every 500 is in the navy, and one-sixth of naval personnel are officers. What fraction of the U.S. population consists of naval officers? Or can this be determined from the information given?
A computer game. A multimedia statistics learning system includes a test of skill in using the computer's mouse. The software displays a circle at a random location on the computer screen.
It's your first day at the Jedi Temple, working as a lightsaber manufacturer. Your first task on the job is to analyze the control and capability of this process. Your main concern is to see if the lightsabers fit within the required length specif..
a. Find the standardized score (z-score), relative to all U.S. births. for a baby with a birth length of 45 cm. b. Find the standardized score of a birth length of 45 cm for babies born one month early, using 47.4 as the mean.
the employees of cartwright manufacturing are awarded efficiency ratings. the distribution of the ratings approximates
briefly restate your research area of interest.a. pearson correlation. identify two variables for which you could
At the 5% significance level, can you conclude that sleeping on the job depends on job category?
All the customers who entered a store on a particular day were given a surgery to fill out concerning their opinions of the service at the store? What type of sample is this? I can't decide between voluntary response or convience.
Consider two stocks: ABC and XYZ with the following information-Draw the efficient frontier of portfolios if (a) the correlation coefficient is 0.4, and (b) -.3. These will be two different graphs
If we assume a normal distribution and a standard deviation of σ = $0.20. , what proportion of passenger trips produced a revenue of less than $1.05?
A sample of n = 500 individuals is asked how many hours they typically spend using a computer in a week. The mean response is x¯ = 8.3 hours.
State the decision for this test. Explain the reason for this decision using a comparison of the critical value to the computed test statistic,a comparison of the p-value to the 5% significance level, and the graph displayed above.
say a random variable x is drawn uniformly from between 0 and 1. say that y sin2pix. what is the covariance between x
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