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Evaluate each expression
1.) 2^3/10-^2 - 2/7^-2
2.) (p^-5)^-9(p^-6)^4/(p^-8)^0(p^4)^-5
3.) 9.3 * 10^-5
4.) 8 * 10^6
5.) 1 * 10^-8/4 * 10^7
6.) Diameter of a circle. If the diameter of a circle is 1.3 * 10^-12 meters, then what is the radius?
A salesman must select 2 of the first component and 3 of the second to take on a sales call. How many different systems can the salesman select?
A random sample of stipends of teaching assistants in economics is listed below. Is there sufficient evidence at the alpha=.05 level to conclude that the average stipend different from $15,000? The data is listed below:
A sample of seed packets was selected, and their weights in grams were recorded as follows: 15.1, 15.6, 15.8, 15.1, 15.5, 15.9, 15.5, 15.2. Determine a 90% confidence interval for the mean weight of seeds in all packets.
Make a histogram showing the probabilties of r = 0, 1, 2, 3, 4, 5, 6, 7 or 8 defective syringes in a random sample of 8 syringes.
Test whether race and NATFAE are independent (α = 0.05). What do you conclude?
An artifact is discovered at a certain site. If it has 46% of the carbon-14 it originally contained, what is the approximate age of the artifact to the nearest year?
Nine percent of undergraduate students carry credit card balances greater than $7,000. Suppose 10 undergraduate students are selected randomly to be interviewed about credit card usage.
If 1000 men and 1000 women are to be interviewed, how accurately could you estimate the difference in the proportions who think that the performance of their atheltics teams has a positive impact on the perceived prestige of the institutions? Find..
At the .01 significance level, can we conclude that there is more variation?
A report states that 46% of home owners have a vegetable garden. How large a sampl.e is needed to estimate the true proportion of home owners who have vegetable gardens to within 4 percentage points with 95% confidence?
A survey of 85 families showed that 36 owned at least one DVD player. Find the 99% confidence interval estimate of the true proportion of families who own at least on DVD player.
What is the difference between the Confidence Interval and the Prediction Interval given in a Minitab printout of a multiple regression? When do you use each?
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