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According to the National Association of Home Builders, 62% of new single-family homes built during 1996 had a fireplace. Suppose a nationwide homebuilder has claimed that its homes are "a cross section of America," but a simple random sample of 600 of its single-family homes built during that year included only 57.5% that had a fireplace.
Using the 0.05 level of signifi- cance in a two-tail test, examine whether the percentage of sample homes having a fireplace could have differed from 62% simply by chance. Determine and interpret the p-value for the test.
Prepare: Prior to beginning your initial post, read the poems "We Real Cool" and "My Papa's Waltz" in your textbook. You are also required to listen to "We Real Cool" and "My Papa's Waltz" before completing this discussion.
Consider these data as random samples from two independent normal populations; carry out an appropriate test to con?rm or refute the hypothesis that instrument 2 is less precise than instrument 1.
1. a study found that 35 of the assisted reproductive technology art cycles resulted in pregnancies. twnety-five
What are the appropriate measure(s) to use in describing the average, shape, and spread of the data according to the scale of measurement for the data (nominal, ordinal, interval/ratio)
1. For the following questions, a calculated probability of equal to or less than 0.05 is considered significant. a. Is it significant to get a 12 when a pair of dice is rolled? Show evidence and discuss.
A researcher is asked to determine whether or not a productivity objective (in dollars) of better than $75,000 per employee is possible. A productivity test is done involving 20 employees. What conclusion would you reach? The sales results are as fol..
Suppose Napoleon were using Bayes' theorm to revise his information. To do so, he would have had to make some judgements about P(Prussian and English Join forces |Napoleon Wins) and P(Prussian and English Join forces |Napoleon loses).
Were the frequency distributions used effectively to report the results? Why or why not? Find an example of a presentation of statistics using a frequency distribution(s) from any media source.
The U.S. trade deficit with Canada (billions of dollars) from 2000 through 2007 is reported as shown in the table. Using exponential smoothing and the smoothing constant a = 0.7, what deficit would have been forecast for 2008? Source: World Almanac..
we select a sample of 56 oakton studens and ask if they have taken a mathe course at oakton. we find that 26 answer
steve and his friends are relaxing at a local tavern. the number of drinks that steves table receives is poisson
assume that the paired data came from a population that is normally distributed. using a 0.05 significance level find
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