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A recent article in Business Week listed the "Best Small Companies." We are interested in the current results of the companies' sales and earnings. A random sample of 12 companies was selected and the sales and earnings, in millions of dollars, are reported below.
COMPANY Sales ($millions) Earnings ($millions) COMPANY Sales ($millions) Earnings ($millions)Papa John International $89.2 $4.9 Checkmate Electronics $17.5 $2.6Applied Innovation 18.6 4.4 Royal Grip 11.9 1.7Integracare 18.2 1.3 M-Wave 19.6 3.5Wall Data 71.7 8.0 Serving-N-Slide 51.2 8.2Davidson Associates 58.6 6.6 Daig 28.6 6.0Chico's Fas 46.8 4.1 Cobra Golf 69.2 12.8
Let sales be the independent variable and earnings be the dependent variable.
a. Draw a scatter plot.b. Compute the coefficient of correlationc. Compute the coefficient of determination.d. Interpret the findings in (b) and (c).e. Determine the regression equation.f. For a small company with $50.0 million in sales, estimate the earnings.
Using WSJ or IBD look up the following stocks: General Electric, General Motors, Microsoft and Intel and answer the following questions for each stock. You may have to refer to several issues of your newspaper for all of the information if the pap..
Use this information to construct a probability table, and then calculate each of the following probabilities:
We are interested in determining whether or not the population in favor of Candidate A is significantly more than 75%. The test statistic is?
Election officials take a random sample of 100 signatures and thoroughly investigate them to find that 84% are valid. Is this statistically significant evidence that the candidate has enough valid signatures overall? Explain.
You're in charge of an experiment to evaluate a treatment which is advertised as being 90% effective at killing a particular insect. You plan an experiment in which the treatment is tested on 200 insects.
Of the physics graduates at a university, 30% had a starting salary of $30,000 or more. If five of the graduates are selected at random, find the probability that all had a starting salary of $30,000 or more.
Use factoring, the quadratic formula, or identities to solve the following equations:
At one excavation site 8641 pot shards have been found that not yet been cleaned and identified. What is the probability that:
A window is in the shape of a square of side s, witha semicircle of diameter s above it. Please help me unable to figure out how to write a function that express the total area of the window as a function of s
Compute the Kappa statistic and its standard error regarding reproducibility of the diagnosis of dyspnea in the clinic.
In your organization's management development program, there was a heated discussion between people who claimed that theory is impractical and not effective
Make a probability distribution chart using reduced fractions to show the following information: The chart below shows the number of committee members who attended a meeting.
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