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When using dummy variables in a regression equation to model a qualitative or categorical variable, the number of dummy variables should equal to
a. one less than the number of categories.
b. one more than the number of categories.
c. the number of categories.
d. the number of other independent variables in the model.
Results from survey of 1000 respondents, point out that 545 favour the dealth penalty for capital crimes. By using a90% confidence level. Create confidence interval estimate for population proportion.
State the alternate hypothesis for this study? What critical value should be used to determine the rejection region? Use the 1 proportion Z-test.
Investigate the cost of a home mortgage and to determine the monthly payment.
Determine the probability that a randomly selected sample of 31 patients would produce an average diameter of 6.6 mm or less for the non affected tendon?
A multiple regression equation for list price of homes in certain community in USA is=170,000 -850 X 1 + 28,000 X 2 , where X 1 signifies age in years and X 2 signifies number of rooms.
The Kirschner Company has a contract to produce garden hoses for a customer. Kirschner has 5 different machines that can produce this kind of hose. Write the constraint that indicates they have to use at least three of the five machines in their p..
What is the 95% confidence interval for the proportion of smokers in the population (to 4 decimals)?
An independent testing services road-tested 36 of the automobiles.
Confirm whether given random variable is binomial distribution or not. If this experiment is finished with replacement, explain why.
Concept of statistical signi cance
The first three digits of a university telphone exchange are 452. if all the sequences of the remaining four digits are equally likely, what is the probability that a randomly selected universtiy phone number contains seven distinct digits?
Suppose you want to test the hypothesis that students who study one week before score different from students who study the night before. A 2 sample t-test test is run based on your data and a p-value is calculated to be 0.0219. What is the approp..
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