Statistics Homework Answers & Questions Page 266

• POPCORN

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• statistics-probability

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• Statistics I : Need Help.

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• Statistical bioinformatics

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• Statistical bioinformatics

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• Statistics Course Project Part 2

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• Statistics Homework

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• Spearman's rank correlation coefficient

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• What is the symbol for the population standard deviation?

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• What do the minimum, first quartile, median, third quartile, and maximum of a box and whisker plot represent?

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• How do you find the outlier in the data: 32, 40, 34, 3 l, 20, 36, 40, 31?

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• What is the empirical rule and how does it differ from Chebyshev's inequality?

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• 1.What is x if the mean of the numbers 4,5,x,8,9 and 3 is 6? 2.what is the median if the mean of 10,8,7,12,x,6,10 and 4 is 8?

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• What is the difference between categorical (qualitative) data and numerical (quantitative) data?

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• What is the difference between using the pooled variance and the unpooled variance in a two-sample t test for means?

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• What is the mode of the numbers: 4, 7, 2, 4, 2, 2, 8, 7, 4, 2?

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• What is the importance of descriptive statistics?

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• What is the difference between continuous data and discrete data?

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• When do you accept or reject the null hypothesis in a chi-squared test?

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• What is the difference between statistical significance and practical significance?

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• How do you find the sample standard deviation on a TI-84?

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• How do you construct a cumulative relative frequency distribution?

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• What is the significance of covariance? What does it mean when the covariance of two variables is positive?

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• What is the formula of the expected value of a geometric random variable?

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• What is the sample standard deviation formula?

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• What is the definition of a "success" in a binomial setting?

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• What is the purpose of a measure of center in Statistics?

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• A test consists of 910 true or false questions. If the student guesses on each question, what is the expected standard deviation of the number of correct answers?

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• The probability that a contractor will get a plumbing contract is 2/3 and the probability that he will get an electric contract is 5/9. If the probability of getting at least one contract is 4/5, what is the probability that he will get both?

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• For a normal distribution, mean u=8. Find standard deviation if r is the variable P(6<r<10)=0.5 ?

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• What is the difference between the line of best fit and the least squares regression line?

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• 14% compounded continuously

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• In how many ways can 4 people be seated in a row of 12 chairs?

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• What does discrete mean?

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• What is the difference between a chi square test of independence and a chi square test for homogeneity?

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• Why is a 90% confidence interval narrower than a 95% confidence interval?

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• How do you find the z-score for which 95% of the distribution's area lies between -z and z?

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• How do you find the experimental probability of a compound event?

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• What is the meaning of a double blind experiment?

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• Is a bell curve symmetric, right-skewed, or left-skewed?

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• Permutation and combination? In your own words, explain the difference between a permutation and a combination. Also, give an example of a problem whose solution is a permutation and an example of a problem whose solution is a combination.?

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• A coin is flipped 12 times. What is the probability of getting exactly 8 heads?

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• What are independent trials, and how do they relate to the definition of probability?

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• How do you find the cumulative relative frequency?

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• How do you find the central angle of a pie chart for a section of the pie chart that represents 20% of the pie?

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• What is a voluntary response sample?

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• What is a z score in regard to relative position?

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• Suppose that X is a discrete random variable with probability mass function p(x) = cx^2; x = 1; 2; 3; 4: (a) Find the value of c: (b) Find E(X)?

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• What are "p hat" and "p"?

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• What is a uniform density curve?

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