Statistics Homework Answers & Questions Page 269

• What is a relative frequency table and what is it used for?

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• What is the difference between a discrete random variable and a continuous random variable?

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• How do you find the critical value of z alpha /2 that corresponds to the given confidence level of 87%?

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• What is the difference between independent events and dependent events?

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• Is the number of questions asked during a 1-hr lecture a discrete or continuous variable?

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• The median is called a resistant measure, whereas the mean is a non-resistant measure. What's a resistant measure?

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• The probability of drawing a green candy from a jar of 20 candies is 1/4. How many yellow candies should be added to the jar in order to reduce the probability to 1/6 ?

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• How do I use a frequency distribution to find the class width?

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• What is a loaded question?

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• What is the mathematical formula for the F-statistic?

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• What is the difference between a discrete uniform distribution and a continuous uniform distribution?

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• What's the difference between a control, constant, dependent and an independent variable?

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• How do you create a boxplot in Excel?

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• What is the variance of the standard normal distribution?

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• What does it mean when a calculated chi-squared value equals 0 (zero)?

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• What is the difference between the R-Squared and adjusted R-Squared when running a regression analysis?

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• What is the purpose of an ogive?

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• What is the purpose of double blind experiments?

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• What is the mode, median, and mean of 3, 12, 11, 7, 5, 5, 6, 4, 10?

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• How do you find the z-score for having area 0.09?

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• There are 200 students in the 7th class at Manchester Middle School. Of these students, 22% play football and 12% play baseball. Eight students play on both teams. What is the probability that a student plays either football or baseball?

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• What is the difference between measures of center and measures of variability?

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• What does the Empirical Rule (also called the 68-95-99.7 Rule) tell you about the approximate probabilities for normally distributed values?

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• Use the standard normal tables to find ##P(z gt -1.22)##.

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• What is the mean, median, and mode for 1,2,1,2,1,3,3,4,3?

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• A spinner has equal sections numbered 1-8. If you spin the spinner once, what is the probability that you will not get a 5?

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• What is the differences among p hat, po, and the p value ?

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• If you don't know the population standard deviation, can you perform a one-sample z test for the mean?

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• What does it mean if P(A|B) = P(A) and P(B|A) - P(B)?

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• The heights of young women are approximately normal with mean 65 inches and standard deviation 2.5 inches. The heights of men in the same age group have mean (and median) 70 inches. ?

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• How do you find the range and interquartile range for 37, 19, 13, 11, 10?

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• What does the R-Squared value of a regression refer to?

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• What is the mode, median, and mean of 8, 2, 8, 5, 5, 8?

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• What is the formula for the chi square test statistic for a goodness of fit test?

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• How many times will EcoR1 cut a random 10kb DNA fragment? How does this change for linear or circular DNA?

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• What is the difference between a correlation matrix and a covariance matrix?

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• What is a partition of sums of squares?

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• What is the interquartile range of the data set: 9, 30, 2, 48, 42, 18, 81, 5, 55, 73, 11?

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• What is the difference between the standard deviation and relative standard deviation?

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• Define role of histogram?

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• What is the difference between a point estimate and an interval estimate?

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• You flip a coin and roll a die. Are these two events independent or dependent?

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• How do I find the class midpoint of scores in the interval 40-59?

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• Is age continuous or discrete data?

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• How many distinguishable ways can the letter of the word SASSAFRAS be arranged using all the letters?

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• How many ways are there to choose a card from a deck of cards (52 cards in a deck) and roll a regular 6-sided number cube?

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• What is range of the data: 5, 3, 9, 10, 2, 12?

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• What is hypothesis testing in Statistics?

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• How do I calculate the 5-number summary?

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• How can response bias influence the outcomes of a study?

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