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In the Happy Hilltop Health Home, 10% of the residents play shuffleboard, 30% of the residents play poker, and 40% of the residents garden. If 28% of the residents play poker and garden and 70% of the residents play both shuffleboard and poker, then find the probability that a resident plays poker, given that they garden.
Assume the least squares equation is Y' = 10 + 20X. What does the value of 20 indicate?
An airline tracks data on its flight arrivals. Over the past six months, 65 flights on one route arrived early, 273 arrived on time, 218 were late, and 44 were cancelled.
From past estimates, manager thinks that about 4% of customers have expressed dissatisfaction. What sample size must you use for this survey?
If you were going to use multiple regression to develop an appraisal model, what other quantitative variables might be included in the model?
A sample of 81 observations is selected from a normal population with a standard deviation of 5. The sample mean is 40. Determine the 95% confidence interval for the population mean.
You are asked to conduct a study to determine if gender has any bearing on the choice of a dog or cat as a pet. You take a random sample of 350 adults and ask each what kind of pet they would prefer, a dog or a cat?
The time, in hours, that a copying machine may work without breaking down is the normally distributed random variable with mean 549 and the standard deviation 68.
In 2002 the Supreme Court ruled that schools could require random drug tests of students participating in competitive after-school activities such as athletics.
Determine which is the dependent variable Y and which is the independent variable X. Explain your reasoning. Draw a scatterplot and indicate the relationship if any. Explain. Compute the least-squares regression equation. Show major line items of you..
a. Formulate the null and alternative hypotheses. b. Which statistical test would you use? Why?
When we have data that are measured at the interval/ratio level of measurement, there are:
What is the Bonferroni adjustment? What would the Bonferroni adjustment be for a study with four groups for which a researcher decided to use t-tests?
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