Q: What does it mean to say that a particular result is statistically
What does it mean to say that a particular result is statistically significant at the 0.05 level or at the 0.01 level? Is a result that is statistically significant at the 0.05 level automatically als...
See AnswerQ: Results from a study of heart disease have statistical significance because heart
Results from a study of heart disease have statistical significance because heart disease is such an important health risk for adults.
See AnswerQ: In an experiment testing a method of gender selection intended to increase
In an experiment testing a method of gender selection intended to increase the likelihood that a baby is a girl, 1000 couples give birth to 501 girls and 499 boys. An analyst argues that this fails to...
See AnswerQ: In an experiment testing a method of gender selection intended to increase
In an experiment testing a method of gender selection intended to increase the likelihood that a baby is a girl, 1000 couples give birth to 501 girls and 499 boys. A company representative argues that...
See AnswerQ: In a clinical trial of a treatment for reducing back pain,
In a clinical trial of a treatment for reducing back pain, the difference between the treatment group and the control group (which received no treatment) was found to be statistically significant. Thi...
See AnswerQ: If one of the examinees is randomly selected, find the probability
If one of the examinees is randomly selected, find the probability of getting someone who passed the exam.
See AnswerQ: A student claims that he was not prepared for any of the
A student claims that he was not prepared for any of the ten true/false questions on a quiz, and he claims that all of his answers to those questions were random guesses. He finds that all ten of his...
See AnswerQ: In preparation for a gubernatorial election in Florida, a pollster conducts
In preparation for a gubernatorial election in Florida, a pollster conducts a survey by randomly selecting 25 voters. He claims that the voters are randomly selected, but he finds that all of them are...
See AnswerQ: In 10 rolls of a six-sided die, the outcome
In 10 rolls of a six-sided die, the outcome of 6 occurs every time.
See AnswerQ: In 10 rolls of a six-sided die, the outcome
In 10 rolls of a six-sided die, the outcome of 6 never occurs.
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