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Question: Why so small? Make a scatterplot of the following data:
x 1 2 3 4 9 10
y 10 3 3 5 9 11
Use your calculator to show that the correlation is about 0.5. What feature of the data is responsible for reducing the correlation to this value despite a strong straight-line association between x and y in most of the observations?
A GSS asked. "What do you think is the ideal number of children for a family to have? the 497 female who responded had a median of 2, mean of 3.02 and standard deviation of 1.81 (a) Report the point estimate of the population mean.
Need to come up with a regression model to forecast monthly sales of cold beverages for the next year. What variables might be included in the model?
Test the hypothesis that the annual incomes of corporate trainers in areas of more than 500,000 are significantly more than those in areas of less than 100,000.
the null hypothesis is to be tested at 95% confidence. Determine the critical value(s) for this test.
The benefits office wants to investigate whether a relationship exists between the level of an employee and their interest in a 401k plan. Using the above data, conduct a chi-square analysis and respond to the following question
State the Null and Alternate Hypotheses. Customize your hypothesis to the business problem context (do not usegenericterms).
Comparing tropical flowers: a contrast (optional). The data in Table 25.1 contain lengths for the bihai variety of Heliconia and for two forms (red and yellow) of the caribaea variety. We wonder (before looking at the data) whether the population ..
Carry out a test of hypothesis on each of regression coefficients. Could you delete any of the variables?
assume that a simple random sample has been selected from a normally distribution population and test the given claim.
in the following probability distribution in table form the discrete random variable x represents the number of
For those in the Viagra treatment group, find the probability that the subject experienced a headache. Find the risk ratio of a headache for those in the treatment group compared to those in the placebo group. Interpret the result
The production process consists of three primary activities: bending and forming, welding, and painting. The amount of time in minutes needed to process each product in each department is shown below:
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