Statistics Homework Answers & Questions Page 267

• What is the average deviation of ##1.76, 2.28, 1.90##?

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• What is the formula for calculating the test statistic for a one-sample z test?

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• A sock drawer has 8 blue socks and 6 black socks. If I randomly select two socks, one at a time, what is the probability l will first get a blue sock and then, without replacing it, a black sock?

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• Is the fuel efficiency (in miles per gallon) of an automobile a discrete or continuous variable?

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• How does an outlier affect the value of the standard deviation?

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• In regression analysis, what does the F-value mean?

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• What is the difference between the Pearson correlation coefficient and the Spearman correlation?

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• What is the median number for the numbers 4, 8, 10, 5, 9?

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• Blood types A, B, O, and AB have percentages 40%, 20%, 30% and 10%. If two individuals are chosen at random, assuming independence, how do you find probability that neither is of blood type A?

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• What are class boundaries in statistics?

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• How many different ways can you choose 3 vowels out of the box, if there are 5 vowels in the box and order does not matter?

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• What is the importance of a histogram?

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• Is temperature a discrete or continuous variable?

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• If we remove all of the queens from a 52-card deck, how many unique four card combinations can we have?

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• A bowl of fruit is on the table. It contains six apples, two oranges, and four bananas. Daniel and Sean come home from school and randomly grab one fruit each. What is the probability that both grab oranges?

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• Is the difference between an OLS regression and a GLS regression qualitative or quantitative?

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• How does r squared related to standard deviation?

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• What is the mode for the sample 3, 2, 5, 7, 3, 2, 6, 4, 3, 7, 2, 4, 3, 5, 7, 5, 1, 2, 5, 3,7 ?

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• What is the average of 10, 18, and 23?

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• At a restaurant, you can choose from 2 appetizers, 4 main courses, and 3 desserts. How many different meals, each consisting of one appetizer, one main course, and one dessert, can be created?

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• How is the confidence interval formula for the slope similar to other confidence intervals that we have calculated?

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• A jewelry box contains two gold hoop earrings and two silver hoop earrings. You randomly choose two earrings. What is the probability that both are silver hoop earrings?

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• How do you find the z-score for sample mean M = 90 for a sample of n = 4?

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• 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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