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Suppose that a researcher does a study to see how level of anxiety (A1 = low, A2 = medium, A3 = high) is used to predict exam performance (Y).
Set up dummy coded dummy variables to contrast each of the other groups to Group 2, medium Anxiety; run a regression to predict exam performance (Y) from these dummy coded dummy variables.
At.01 significance level, can we conclude that 30-year mortgage rate for small banks is less than 6%? Evaluate the p-value.
The following frequency distribution was obtained. The data values are in hours. Construct a histogram for the data .
Using Analysis of Variance (ANOVA) test at 5% level if there are important differences in mean sales calls made across the three branches.
High levels of glucose in the blood are indications of diabetes, which is becoming more prevalent in the United States. Diabetes can lead to many complications such as blindness and heart disease. A random sample of 180 individuals had their blood su..
Part 1. What is the appropriate distribution for such data? Part 2. Is this lot anomalous?
The random variable x is known to be uniformly distributed between 1.0 and 1.5.
You find that a random sample of five microwave ovens has a mean repair cost of $75 and a standard deviation of $12.50. At α = 0.01, do you have enough evidence to support the repairer's claim?
Solve the mean and standard deviation equations
Create a 95% confidence interval for population proportion of positive drug tests.
Determine the coefficient of correlation between the two variables. Interpret the value.
In order not to violate the requirements necessary to use the chi-square distribution, each expected frequency in a goodness of fit test must be:
Categorize the following as discrete or continuous random variables.
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