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Tax Rate A Stat Crunch survey asked people what they thought the maximum income tax rate should be in the United States.
Make separate dotplots of the responses from Republicans and Democrats. If possible, put one above the other, using the same horizontal axis.
Then compare the groups by commenting on the shape, center, and spread of each distribution.
The data are at this text's website. (Source: Stat Crunch Survey: Responses to Taxes in the U.S. Owner: scsurvey)
Researchers have shown that there is a positive correlation between average fat intake and the breast cancer rate across countries.
U.S Census data show that 14% of the consumer population is 18 to 24 years old. Given the consumer is 18 to 24 years old, what is the probability that the consumer use a plastic card?
Justify your answer by finding the probability of each. (A calculator would be useful to get numerical values for the probabilities)
In hypothesis testing when is a two-tail test used in lieu of a one-tail test?
To estimate the average time it takes to assemble a certain computer component, the industrial engineer at an electronic firm timed 40 technicians in the performance of this task, getting a mean of 12.73 minutes and a standard deviation of 2.06 mi..
Discuss the most important features of the Southern slave system that existed before the Civil War?
a large firm has 85 of its service calls made by a contractor and 10 of these calls result in customer complaints. the
A company adminsters an "aptitude test for managers" to aid in selecting new management trainees. Prior experience suggests that 60 percent of all applicants for management trainee positions would be successful if they were hired.
Suppose two cards are drawn at random from the deck with replacement. What is the probability that the second card is a heart, given that the first card is a heart?
Sum of shaded area is equal to one. Smoothed histogram or density curve. How we view the "distribution" of a dataset can depend on how much data we have and how it is binned.
Use the 5-step approach to hypothesis testing and the calculation of the 95% confidence intervals to answer the following research question: Did you observe a significant difference in Systolic Blood Pressure (SBP) over the course of the study?
Are the sample means still non-Normally distributed? How does the sampling distribution of the sample mean change as you increase the sample size
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