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Find an SAT percentile.
Reports on a student's ACT or SAT results usually give the percentile as well as the actual score. The percentile is just the cumulative proportion stated as a percent: the percent of all scores that were lower than or equal to this one. Renée scores 2040 on the SAT. What is her percentile?
question suppose studies have shown that approximately 20 .2 of americans regularly engage in exercise at least 3 times
Describe a hypothesis test study that would help your work or conclusions in some way. Describe what variable would be tested and what would be your guess
Question 1. A production process is known to produce a particular item in such a way that 5 percent of these are defective. If two items are randomly selected as they come off the production line, what is the probability that both are defective (a..
I am 12 years old. My class had a discussion on whether police used unnecessary force when arresting the people from Operation Rescue.
What is the population parameter of interest in the quote?- The phrase "an estimated 15 to 30 percent" indicates that scientists don't know precisely what percentage of the population has the allele. Explain why they don't know.
If the proposal textbook receives favorable reviews, how should the editor revise the probabilities of the various outcomes to take this information into account?
What's the probability that fewer than 2 of the randomly selected truck drivers are women? What is the expected number of women in a random selection of 20 truck drivers?
(b) Would it still be an interval scale if we multiplied each score by 10? Explain.
Why do we need hypotheses tests? What is the difference between the null hypothesis and the alternative hypothesis?
Use a 95% confidence interval to validate the Harris Interactive findings.
The number of defective items produced in a week by each of 5 different production lines (called A, B, C, D, and E) is as follows:
A test for a disease that affects 0.1% of the population is 99% effective on people with the disease (that is, it says they have it with probability 0.99).
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