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Researchers in the Adirondack Mountains collect data on a random sample of streams each year. One of the variables recorded is the substrate of the streams the type of soil and rock over which they flow.
The researchers found that 69 of the 172 sampled streams had a substrate of shale. Construct a 95% confidence interval for the proportion of Adirondack streams with a shale substrate. Clearly interpret your interval in this context.
Multiple choices based on regression analysis - how much or how many but instead is assigned values to represent categories
Recent studies indicate that the typical 50-year-old woman spends $350 per year for personal-care products. The distribution of the amounts spent is positively skewed.
If you were opening a new business, what kinds of surveys or studies would you want to conduct before investing your time and money? How would you conduct these studies
At the .01 significance level, can we conclude that the 30-yeer mortgage rate for small banks is less than 6 percent? Estimate the p -value.
Make a worksheet in Excel for your calculations. (b) Make a histogram of the data. Would you be justified in using a parametric t test that assumes normality?
Twenty subscribers were surveyed, it found that the annual health insurance premiums for a family with coverage through an employer averaged $10,979.00. The standard deviation of the sample was $1000.00.
the human relations director at dupont began a study of the overtime hours in the inspection department. a sample of 16
Your firm has 3 different manufacturing lines that each produce the same type of widget
lets say a publisher makes one typo per 1000 pages. without using the formula or calculating any numerical answers
The advertising firm of McMann and Tate has put out bids for two separate contracts. Based on past experience, they believe that they have a 0.7
question a production run of toothpaste requires a fixed cost of 100000. the variable cost per unit is 3.00. if 50000
in an examination of holiday spending known to be normally distributed of a sample of 16 holiday shoppers at a local
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