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The chi-square test. Think of a real-world situation that would best be analyzed using this technique. For this Discussion do the following:
1. Clearly describe the dependent and independent variables you would study;
2. State the research question and statistical null and alternative hypotheses; and
3. Explain why this test is appropriate and why the correlation, t-test, regression, or ANOVA is not appropriate.
Real world situation can be something simple.
At α = .01, did yellow fire trucks have a considerably lower accident rate? Determine sample proportions and z test statistic.
The sensitivity of a test is the probability that a person having the disease will test positive (indicating the person has the disease, i.e., it's the probability the test will pick up the fact that a person has the disease).
ABC insurance sells term life insurance policies. If the plicy holder dies during the term of the policy ABC pays out $100000. If the person does not die ABC pays nothing and there is no further value to the policy.
When assigning probabilities of two simple events, can we assume that each event is always equally likely to occur and, thus assign .5 to each event?
Construct a 95% confidence interval estimate for the population proportion of airline travelers who think that the airline fee that is most unreasonable is additional charges to redeem point/miles.
Farrell Corporation's common stock is $25. The price is expected to increase by $5 over the coming year. The standard deviation of the expected price is $3.
Provide an example from your work or home life; illustrate the difference between the application of descriptive statistics and inferential statistics.
A medical researcher found a significant relationship among a person's age x1, cholesterol level x2, sodium level of the blood x3, and systolic blood pressure y.
Do the sample data present sufficient evidence to reject the manufacture's claim? Test using a a=0.05. What is the p-value of the test.
Consider the following data on distances traveled by people to visit the local amusement park and calculate the relative frequency for the shortest distance.
A statisitcs professor plans classes so carefully that the lengths of her classes are uniformly distributed between 45.0 and 55.0 minutes. Find the probability that a given class period runs less than 50.5 minutes.
How do we use a least squares regression line? What is the range for the coefficient of determination?
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